Hey I went on vacation and left my guinea pig alone for the weekend. My sister came and check in on her Saturday. ( I left Friday and returned Sunday). Her food, hay, and water was untouched. When I returned she was really excited and began eating. she has lost a little weight though she seems fine. This happened one time before when I went to my sisters for a night. I’ve only had issues when I wasn’t there at all. ( normally I am)Any reasons why? Is this normal?