Lemon was always hungry

"Lemon was always “hungry”. The vet said he was leaking protein which was the reason caused him kept on eating. The prescriptions didn’t work very well and we worried about whether his joints would support his weight if his eating habit kept going. Much heard about these supplements so we decided to give it a try. All the kitties at home are extremely fussy about their food. So there’s no way I can mix them with his meals but have to feed directly into his mouth. Fortunately he’s cooperative. His eating pattern has changed since. He won’t ask for food beside mealtime and no more vomiting brownish stuff. I decided to weigh him this morning and to my surprise, he has lost nearly 800g and we also notice that he walks better recently"