I have had my two female guinea pigs for about a month now and one of them constantly has watery poop. When I got her she had a little bit of a big belly but after a week or so it was so much bigger that I thought she was pregnant. I took her to the vet and he said she wasn't but that maybe she eats too much. He told me not to feed her pellets anymore. So I fed them only timothy hay and once in a while alfalfa hay. But she still has a bloated belly and has especially watery poop when I feed her vegetables. The weird thing is that my other guinea pig has no such problems no matter what I feed her. She is also growing (in body size) much faster and she feels very solid and healthy. But my pig with potty problems feels very skinny even though she eats constantly. Other than that though she seems perfectly healthy; she's active, chirps a lot, etc. I'm wondering if she could have worms or if all of this is due to her diet. I'd really appreciate any advice because I want to help make my piggie healthy!!