Thanks so much for your reply! Yes, Milo tested negative for hyperthyroidism. I first noticed the change to 10.8, then 10.6, and now 10.4. He's maintained his 11.2 for 8 years, and now all of a sudden a drop. I really hope the prescription food will help!
My best buddy, my 11 (soon to be 12) year old neutered male cat, Milo, has gone from 11.2 pounds to 10.4 pounds in a matter of months. I have been monitoring his weight ever since he was diagnosed with idiopathic hypercalcemia when he was 4. Almost 8 years of a consistent weight, and now this...