Just last night Charlie was fine, running up and down the house chasing his ball perusal. Even this morning he was acting normal and ate his food. It wasn't until his second feeding that I noticed he didn't come running for food. He's always the first one to come for feeding time. From then I realized that all he wanted to do was just lay down and hide away from me every time I get too close. I got him to eat a teeny tiny bit but it wasn't much. He has also been gagging and did regurgitate a clear liquid that was a bit slimey, about the size of a nickel. Should I make an appointment for him or give it a day or two? I hate seeming him just hide away, it's not normal for him. He usually loves sleeping on his cat tree or on the couch.