Reptile & Amphibian Forums

So, I know we talked previously in a couple threads ago about my cats weight loss (Thread below- "Too Thin!" to refresh your memory) My cat lost more weight, so after blood work, and x-rays, and everything was normal, I gave in and switched her back to Purina Cat Chow. As predicted, within a month I weighed her and she had gained a pound back and had muscle mass around her spine, instead of me being able to feel her spine when I touched her. She ate the same amount, yet she was losing weight on the Wellness Brand. I understand that you've mentioned cats should not be on a dry diet, and I plan on switching her to canned, but Im confused as to why she would gain weight back on the Purina (Indoor cat chow) but lose so much weight on the Wellness Brand? My vets response was "Some cats just don't do good on certain foods".

Whats your answer as to why she would lose weight on Wellness, but not Purina?

You didn't mention how much your cat weighs, but the average cat weighs between 8 and 10 lbs. If she continues to lose weight, that is a problem, but if she reaches a steady weight on a new food, even if it is less than on the other food, that is not a problem. If your cat is eating the same quantity of both foods, and lost weight on one, check the nutrition panel to see how many calories each food has per ounce, as there may be a difference there. Do you give her a specific amount of food per meal, or does she eat all that she wants? She will try to eat until her nutritional needs are met. Check the consistency of the stool to be certain that she is digesting well what she is consuming. Cats don't handle carbohydrates well, and tend to get fat on a diet high in carbs, but without examining the cat I can't say if she became too skinny on the Wellness or got too fst on the Purina. It is still preferable to have her on canned or fresh food.