I have a 8 year old male (neutered) indoor only cat, diagnosed last month with lymphoma (confirmed through rads and outside lab cytology). He is on 1 ml of prednisone once a day and recieving vincristine injections, once a week, for the last 3 weeks. He has had intermittent vomiting, mainly from the pred, since we switched from liquid pred to pills, the vomiting has decreased. Rads show that the tumor, in the thoraic cavity, has shrunk significantly since beginning the vincristine. He is FELV negative, retested after the lymphoma diagnosis.
My question is that he will not eat, he has lost about 2-3 lbs since the diagnosis, every week he is 1/2-1 lb lighter. He has been offered everything i can think of for food, wet food (i tried every can for sale at the local grocery), dry food, treats, etc. He is not interested, won't eat anything. Other than not eating, he appears in good spirits, appears to be drinking (he is not dehydrated), using the litter box, eyes are bright, he is his normal affectionate self. My husband and I wonder if he is eating at night when we are sleeping (we do not free feed because we have 3 cats total but we leave the measured food out overnight if it hasn't all been eaten) but he is losing weight at a rather rapid pace. Further rads do not show any evidence of lymphoma in the digestive track, and CBC looked good, all taken 5 days ago when he continued to lose weight. What can I do? Is this from the lymphoma? He is supposed to get his last weekly vincristine (then goes to once every 3 weeks) and start on Cytoxan (i think its cytoxan, i could be using the wrong drug name) this week.