Tilly has been very quiet and has had no appetite since she came back from our cabin Monday night. She was pretty normal walking around in the snow at our cabin, and first I just thought she was tired out after 4 days at the Mountain, but she has gone outside and laid down in the snow at home, and seems disoriented. She is drinking and had normal pees and poos, but no appetite at all, and will only get up and walk if I really ask her. At 13, She is old, but just had a wellness check last week with no obvious problems. We have a vet appointment this afternoon, but I am concerned that something significant is going on.