We have four cats, and three of them (Chester, Minnie, and Bandit) are all normal sizes and weights. But our forth, Tiger, is very overweight.
He'll eat constantly all day, and roughly 7 out of 10 times he'll eat until he throws up, and at that point he'll just go to a different food bowl and empty it. (we have food available throughout the day and our other 3 cats simply stop eating when they're full.) None of our other cats do this. Also, if he becomes excited the first thing he does is eat. Tiger also wheezes alot and lays down alot, and often grunts or coughs when he runs.
We suspect it might be something with his stomach, for we found him as a very tiny kitten and fear he may have been weaned too early. My friend thinks he may have diabetes, but I wouldn't know the signs or symptons to look for.
Any advice is welcome.