Hi PLEASE HELP, I have been having trouble trying to decipher what is wrong with my guinea pig. He is only 5 years old and has never had a problem before. This morning I woke up and went to feed him and noticed he was squealing a little too much and they didn’t sound like his normal squeals is almost sounds like he’s in pain. He usually grabs the tomato with his teeth and then eats it but this time he grabbed it and nibbled a little bit and that’s it. He always finishes eating his veggies. And now he won’t eat anything and has been squealing a lot within only an hour. He’s not visibly injured and he is walking perfectly fine but he has been repeatedly going into his little house and not coming out for awhile.