My female guinea pig, Butters, has stopped eating her pellets. My boar will eat his and i always feed them the same brand. She never had this problem before and its a little unsettling. She'll eat carrots and hay and shell drink. I'm just worried. Shes five years old and was in perfect health a week ago. Shes lost a lot of weight and sleeps a lot. Shes stopped pooping too. I honestly have no idea whats wrong. Please help I'm a first time guinea pig owner.