Also, have you brought in a stool sample to your vet for testing recently? At our practice, we're happy to get one stool sample a year per pet to test for parasites. However, in order to get a true negative, three samples need to be tested at various times. My dog's first stool sample tested negative but a few weeks later I took another sample which tested positive for giardia. Since being dewormed twice her diarrhea has finally gone away and her coat is now shiney and healthy looking (parasites deprive dogs and cats from essential nutrients). If Wednesday is an outdoor cat or a mouser he/she may have picked up a parasite which could be responsible for the weight loss.
Or, since you've been feeding an "older cat" formula it may contain less calories which have contributed to the weight loss. If Wednesday is not overweight and is active you may not want to limit his/her calories.
It can be an expensive process but a 1/2lb. for a 10lb. cat is a greater percentage of body weight than it would be for us. I really didn't understand all the testing of stools, and urine, and blood before I began working at the animal hospital but, as I tell our clients, I don't mind the expense because, at least in my case, my pets are "the most agreeable members" of my family :o)
Best Regards,
Thanks again! We adopted Wednesday a few months ago from a family who was moving. She hadn't had her shots in several years, and she was overweight, filthy, and had fleas. We've been getting her fixed up ever since! She needs to lose about 2 more pounds to be a healthy size.
The vet tested a stool sample this morning, and said it was okay.
There are some farm supply places around here; I'll keep my eye out for the food.