I have 2 cats with one being skinny and extremely active but the other is fat and always a pig. Skinny cat started vomiting and fat cat ate non-stop never getting full. Skinny cat lost 20% of his weight while fat cat gained at least that much. Skinny cat was nearly dead from starvation, so he went to the vet. $600 later blood test showed he was eating a very high fat diet with Pancreatitis. Fat cat was eating non-stop because he was only getting fat from food. I had noticed gel on the food since WEF stated pets need to go.