Hi I have an eleven year old cat. He had a hematoma on the tip of his ear and I opted out of the surgery. He has been ok but suddenly he has lost weight not a lot. He is also chewing funny,had an oily spot on the back of his neck which went away as soon as I washed it. (I thought my son got pizza grease on him). He has been his playful self until this morning he threw up and was not being himself. He hid under the bed all day. I have Vet appointment in the early AM . He finally came out to eat at 10:30 pm not he is sitting in meatloaf position which is not a normal position for him.