My cat, Chester, has always been skinny and active. After we moved, we noticed him putting on a little weight. He has become lazy and extra snuggly. Now, very suddenly, he is seriously bloated and obviously uncomfortable. He is having trouble moving around, and he keeps squatting like he is trying to poop, but nothing happens. I figured he was constipated, and read that milk would help, but it does not seem to be doing anything. Does anyone know what might be going on or how I can help him?