Could My Cat be Allergic to His Food??
Recently one of our clinic kitties, “O’Malley”, began vomiting and losing weight. In addition to blood work and fecal testing, we started a food trial on him. We initially saw improvement in both his weight and vomiting, but after 6 months, he began to show signs again which caused us to investigate his “compliance”. Below is a discussion of food trials, including reasons and pitfalls.
Cats can have reactions to food causing gastrointestinal signs (vomiting, diarrhea, decreased appetite, weight loss), sometimes skin signs (excessive licking or scratching, hair loss, skin irritations and lesions on the skin, lips, paw pads or ears), and even respiratory signs (coughing , wheezing, trouble breathing, asthma signs). Interestingly, allergies are not typically associated with sneezing or runny eyes in cats the way we think about it in people.
The reactions can be true allergies (involving an immunologic response) or non-immunologic (food poisoning, reactions to toxins or additives in the food).
Diet trails are recommended by your veterinarian to see if your cat’s clinical signs improve or resolve once the diet is changed. Trials can take anywhere from 2-12 weeks to see response. Blood testing for allergies measures levels of immunoglobulin E (Ig E) and is not accurate for food allergies or sensitivities because not all allergic reactions are mediated by IgE, nor or all food reactions mediated by the immune system.
The diets that are recommended may be single source protein and carbohydrate diets that your cat has never eaten or hydrolyzed protein diets (where the proteins are broken down so tiny as to not cause a reaction). A veterinary therapeutic diet is recommended because over the counter diets are often not pure and can still contain protein sources to which your cat has previously been exposed.
Pitfalls include supplementing your cat with treats or other food sources to which he is still sensitive or allergic to, feeding over the counter diets, cats not wanting the new food, or cross reaction between the protein in the recommended diet and a protein to which your cat is sensitive. Examples might be turkey cross-reacting with a chicken allergy.
You may need to keep your cat indoor to ensure he is not scavenging food at the neighbors’ and you may need to use dry kibble or baked canned of the prescription diet as treats so that visitors will not be tempted to feed your cat non-prescription treats. All medications should be checked to make sure they do not contain proteins in the liquid or capsule that could create reaction. This includes heartworm and flea medications.
In some cases you may chose to cook a homemade diet for your kitty. If so, it is recommended you consult with a board certified veterinary nutritionist to formulate your cat’s diet. Check the acvn.org website to find a nutritionist in your area.
So, what happened to O’Malley? Well, we ruled out clients and staff members as a source for “supplementation” of his diet and performed an abdominal ultrasound on him. The findings indicate some intestinal and liver disease that did not show up on blood work and is worsening despite the food trial. He is scheduled to have biopsies of his in the next week and we will keep you posted on his case!
Poop Kentucky Derby
Ever wonder why your cat sprints out of the litter box after voiding or even around the house out of the blue?
Cats have different types of behaviors, but certainly play behaviors are one of the most interesting. Different play behaviors will begin as early as 2 weeks of age. Chasing type behaviors manifest around 5 weeks of age and serve to improve hunting skills, social interactions with other cats and general exercise.
Most owners have seen their cats sprint around the house as if they are chasing or being chased by another cat with their pupils dilated and perhaps even pausing to yowl or chortle.
This type of behavior is termed “hallucinatory” behavior and often occurs immediately after your cat urinates or defecates. There are different theories as to why the behavior occurs upon exiting the box, including a feeling of well being and increased energy after evacuation, a sense of empowerment after creating their characteristic scent, or a reminder of natural instincts requiring leaving the scene and scent behind quickly to prevent being preyed upon.
However, sometimes the behavior can be associated with dislike of the box size or location, dislike of the type of litter, fear of attack by other cats in the household, pain associated with urination or defecation or sometimes fecal matter adhering to the hair after defecation.
If your cat spends at least 15-20 seconds scratching or burying in the box, chances are they are happy with their litter. Cats that have pain on urination or defecation will often times vocalize in a distressed manner and may urinate or defecate outside the box as well. Occasionally small drops of blood may even be seen. Inappropriate elimination, (urinating or defecating in locations other than the box), will also tend to occur if the box is not clean enough, or if there is fear of another cat in the household. Long haired or overweight cats that have trouble removing fecal matter during or after defecation may rush out of the box and then stop suddenly and begin grooming the perineal area or scooting to remove the fecal matter.
Regular veterinary exams and laboratory evaluations can help rule out pain secondary to arthritis, gastrointestinal problems such as parasites or inflammatory bowel diseases, urinary disorders and even behavior problems within the household.
Keeping your cat healthy and fit will improve activity and provide years of fun for the whole family watching these fast and furious felines as they “run for the roses”.
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