I'm getting really concerned for my guinea pig. For the past 3 or so days, she hasn't been pooping as regularly as she used to. We've had her for a year and a half, and no problems until now. She usually pooped at least a couple times every hour, but now I only see her squeeze out about 1 or 2 poops a day. And they're not hard poops, they're more like diarrhea (wet and mushy). My parents don't want to take her to the vet because very little vets actually know much about guinea pigs and I've heard antibiotics can be bad to get in some cases. She also seems to be whistling/squeaking for food more than before, and she acts like she always has (happy, jumpy). She doesn't eat much hard food any more (pellets, etc.), but she still eats her hay (every now and then). The only problem with eating/drinking is that she barely drinks at all. I check her bottle every day, and it seems like the water level isn't decreasing. I tried giving her a bowl of water, and she seemed to drink from that (but not too much). Please help me, I'm really concerned for her!