Feline Oral Resorptive Lesions

If you have a cat, you may have heard one of us refer to our hated friends called FORLs. FORLs, which stands for feline oral resorptive lesions, are a relatively common dental finding in our mature kitties and boy, do they frustrate us!  These lesions are similar in appearance to human cavities, but form in an entirely different manner. Cavity formation is ultimately due to bacteria. With feline resorptive lesions, a type of cell, called an odontoclast, is more active than normal resulting in destruction of the tooth.

The resorptive lesions typically start as very small pinpoints and can be found on any part of the tooth. Often times, they hide out along the gum line or underneath the gum line making them nearly impossible to find without dental x-rays.  For example, the x-ray below is of a cat that came in for a dental procedure. His lower canine teeth both looked healthy during his oral exam. However, when we took x-rays of his lower teeth, I saw a significant resorptive lesion under his gum line. Because of this lesion, this tooth ended up being extracted. If we had not taken x-rays of his teeth, this lesion would have been missed and the poor kitty would still be in a significant amount of discomfort.

Tooth resorption is progressive and can reach the point where the pulp cavity becomes exposed. When this occurs, bacteria can enter into the tooth causing a major dental infection. The surrounding gum tissue also becomes inflamed and painful.   Because of the tooth destruction and tissue inflammation, these resorptive lesions can cause a significant amount of discomfort and pain. With these cats, clinical signs associated with oral pain can be seen, such as excessive salivation, head shaking, sneezing, and anorexia.

Unfortunately, once a resorptive lesion is present, there is nothing we can do to fix the damage or stop the progression. If the lesion is small, we often do not have to remove the tooth and will continue to monitor this lesion closely.  If the lesion is more severe, then the best treatment is to remove the tooth.

The cause of these resorptive lesions is still a mystery, and thus we don’t know how to prevent them from forming. The best thing for our kitties is to routinely perform a dental exam as part of their yearly physical exam. It is also important to bring your cat in if you notice any signs of oral discomfort or pain, as this may be an indication that there may be a resorptive lesion present

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Adopt a Rescued Rabbit Month

Did you know that February is “Adopt a Rescued Rabbit” month? If you are looking for an intelligent, engaging, and entertaining pet for your family, keep in mind the dozens of rabbits looking for a home right here in Minnesota!

In honor of “Adopt a Rescued Rabbit” month I would like to share one of my favorite bunny patients with you. Amelie is a lovable young Mini Rex who I first met when her owner noticed a red, raw nose and some scabs around her eyes. Despite starting an antibiotic to help with a suspect upper respiratory infection, her nose became progressively raw and crusty, as you can see:

When her nose started looking like this, I knew this wasn’t a typical “snuffles” case. Amelie’s lesions were very consistent with “rabbit syphilis.” This bacterial infection, caused by Treponema cuniculi, can be transmitted at breeding or from a mother to her kits.

After assuring the owner that the disease cannot be transmitted to humans, we talked about treatment. Although a biopsy of Amelie’s nose would give us a definitive answer, her lesions were so typical of the disease that we decided to do a “treatment trial” with injectable penicillin, the antibiotic of choice for this infection.

One week after the first injection, Amelie’s nose already looked a lot better . . .

 

And, one week after her 2nd injection . . .

By now, Amelie was noticeably more active, eating better, and gaining weight. We gave her one final penicillin treatment as a protective measure. I am happy to report that she is now back to her normal, curious self at home and her syphilis infection is a thing of the past!

If you are curious about the rewards of rabbit ownership and companionship, please give the Animal Wellness Center a call so we can talk!

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Have You Brushed Your Cat’s Teeth Today?

This past week, I was reminded of the importance of dental health in our feline patients. My own kitty, Walter, has always battled gingivitis (inflammation of his gums) from a young age. Lately, we noticed his breath was really stinky and I could see the calculus that had formed on his teeth. Walter came in and had a dental procedure performed. Luckily, he didn’t have to have any teeth extracted, but all of the calculus was cleaned off his teeth!

Just like with us, dental health in cats is a very important part of their overall health plan. Overtime, bacteria and other debris accumulate on the teeth, called plaque. This plaque eventually changes to a hard substance called calculus (tarter), which is what we start to see on the surface of the teeth.  This calculus can cause painful gingivitis and also encourages the formation of additional plaque. If the calculus and gingivitis are not addressed, periodontal disease will result, which causes pain, tooth loss and severe infection.  As dental disease progresses, the gums recede, which allows bacteria to travel into the blood stream. Once bacteria are in the blood stream, it can travel to multiple organs throughout the body and cause other major diseases.

To address the accumulation of plaque and calculus, we recommend having a dental procedure performed. With a dental procedure, our patients are anesthetized and their mouth is fully examined for signs of disease. We then take x-rays of all the teeth to make sure roots of the teeth look healthy. We then use a combination of ultrasonic scaling and hand scaling to remove the calculus on the teeth. The teeth are then polished to smooth the surface (and leave their breath minty fresh!).

It is also important to try and prevent this calculus from forming in the first place. The best way to try and prevent this accumulation is to brush the teeth regularly. However, many kitties do not appreciate this and it becomes a real hassle. But, don’t despair…we have other options! There are dental treats and dental diets available for cats. We also have drinking additives that help reduce plaque accumulation.

With prevention, we hopefully will prevent the start of dental disease. However, it is also important to watch your cat closely for any signs of oral discomfort.  Signs that they may have oral disease include bad breath, changes in eating habits, pawing at the mouth, excessive drooling, and/or loss of appetite.  But we all know cats are really good at hiding any discomfort, so that is why we take a good look at the teeth during each wellness exam!

Together as a team we can hopefully keep your kitty’s smile looking great!  In honor of National Pet Dental Month we are offering 20% off all pet dental products for the month of February (offer excludes dental diets).

For a demo on brushing your cat’s teeth, go to: http://partnersah.vet.cornell.edu/pet/fhc/brushing_teeth

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Moving Beyond the Dominance Theory (Part 2)

In part one I discussed the origin of the dominance theory of dog training and how it has lead to misconceptions about how dogs learn and behave. The notion of wolf packs as a strict hierarchy of individuals who are constantly fighting for dominance is a misconception based on a flawed study of wolf behavior in the 1940’s. Normal wolf pack behavior is relatively peaceful and highly cooperative with various adult animals taking on leadership roles when their particular talent is needed for pack security and survival. They are quite like human communities in which we defer to different authorities in different situations such as the police, our doctor’s recommendations, a lawyer’s advice or other individuals with an area of expertise for the matter at hand.

Although dogs are ancient descendents of wolves, they have undergone 15,000 years of evolution under the guidance of mankind. Humans have selectively bred dogs for the specific tasks, physical appearance and behavioral traits we desire in our companions. We have profoundly changed them from the wild wolf.

When it comes to living and working with dogs, the concept of dominance is largely irrelevant.

Let’s bust some myths about dog behavior and examine some of the behaviors that have been misidentified as dominance messages from our dogs. Contrary to what you may hear in the media or read in older training materials, your dog is NOT expressing dominance toward you when: 1. He runs through the door first, 2. Sleeps on your bed, 3. Jumps up on you during a greeting, 4. Steals unattended food from the counter or 5. Fails to come when called. Rather: 1. He knows fun things happen for dogs when you take them outside so he is in a hurry, 2. Your bed is a very comfortable place to nap, 3. Jumping up on you is fun and joyful when you come in the door because you are awesome and they have been alone, 4. Dogs by nature are opportunistic scavengers for food and you just played right into their hands (paws), and 5. He failed to come when called because you have not adequately reinforced the “come” command or, worse yet, when he finally does come, you punish him.

Dominance is NOT a personality trait. It is primarily a descriptive term used to characterize the relationship between two individuals of the same species when one dog, for example, wants first choice of an available resource such as toys or sleeping areas. Even between dogs dominance is not achieved by force but by one individual acquiescing to the other. Furthermore, the status between individuals is fluid so that one of the dogs may have first call on the toys and the other gets to have the preferred sleeping area. I had two small, male dogs and they both thought they were in charge of everything in the universe (yes, they were Yorkies). When they reached psychological maturity this presented a bit of a power struggle. After sorting things out for several months, they came up with a perfect, peaceful solution. Jiggs was in charge when they were indoors and Jelly Bean got to be the leader when they were outdoors.

Aggressive behavior in dogs is not an expression of dominance. Using aggressive behavior to get what they want is actually an expression of anxiety in which the aggressor is insecure and frightened. A good example is the dog who barks ferociously at a stranger passing by. He is motivated by fear and is doing his best to get the scary thing to move away from him. The barking is usually effective and the stranger moves on by. In this case the aggressive behavior worked (the scary thing went away) and therefore is self rewarding making it more likely to be repeated in the future. Proponents of the dominance theory will say to correct this behavior you should grab the dog by the neck, yell and pin him on his back. But meeting an already frightened animal with human aggression will only serve to increase the dog’s fear of the stranger and of you. Rather, the goal is to decrease the dog’s fear and show him that when strangers pass by good things, like treats or play time, happen for dogs. This replaces the dog’s fear of strangers with a positive expectation. It allows the frightened individual to relax so that he now has the cognitive space to learn a new response to the sight of a human he does not know. It also replaces the damage of human-on-dog aggression with a technique which does not damage your relationship with your dog.

Modern, educated trainers now present concepts that focus on building a caring and cooperative relationship with your pet. They use terms like leadership to suggest our role is one of teaching and understanding rather than force and coercion. Dogs lack the ability to use human speech and language putting them at a significant disadvantage when it comes to understanding our rules for living with us. It is incumbent upon us to gain a better understanding of dogs and to provide them with the guidance they need to learn how to live in our world. Just as in our human community, we have more harmonious relationships and can thrive in a world where the rules are clear and consistent.

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Moving Beyond the Dominance Theory – Pt 1

Have you ever been told that your dog’s behaviors indicate that he is trying to dominate you and take power in the household? If so you are certainly not alone. This myth has been preached in the popular media and by many dog trainers for decades. Let’s set the record straight.

The original alpha/dominance behavior model has its roots in an observational study of wolves conducted in the 1940’s by R Schenkel. In his study wild wolves from different packs were captured and held in a small, fenced enclosure. Their behavior was then recorded and analyzed and conclusions were made about how the observed interactions defined wolf and dog behavior. The study was fundamentally flawed as these were unrelated wolves that were forced into close association with each other in a captive environment. The resulting behaviors were anything but normal.

Research from the past 20 years in which wild wolves were observed in their natural environment clearly shows that in fact wolf packs are organized similarly to human families. The packs live relatively peacefully with little aggression and few struggles for dominance. Individuals within the pack actually defer to each other depending on the task at hand, for example which dog is the best hunter, fastest runner, best scout etc. Wolves depend on their pack for survival so it is to their evolutionary advantage to avoid fights and to concentrate on cooperation. Senior Research Scientist L. David Mech, having spent many years studying wolves, wrote in 2008 we should, “once and for all end the outmoded view of the wolf pack as an aggressive assortment of wolves constantly competing with each other to take over the pack.”

The next common misconception is that dogs think and behave like wolves. Dogs do share an ancient ancestry with the wolf but their evolution has diverged for the past 15,000 years. Since that time humans have been selectively breeding dogs for specific characteristics and skills. We chose dogs that were friendly and enjoyed human companionship. We needed dogs that would help us keep our camps clean (eating our garbage) and protect us from predators (barking to alert us). In turn, they enjoyed an easy meal and the warmth of the campfire. This has been from its very beginning a symbiotic (mutually beneficial) relationship. Trying to liken dog behavior to wolf behavior makes no more sense than trying to learn to be a better parent to our children by observing chimpanzees.

In part two of this article we will focus on how dogs learn and why aversive training techniques are not only inhumane, they often make matters worse especially when aggressive behaviors are involved.

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