This morning, Wolfie got up, acting his usual self. I took him outside. Pee and poop were normal. I brought him in, wiped his paws off from the rain, and we started upstairs to get his breakfast. he got to the top of the stairs ( I take him out through the basement) turned around and ran back down. Then he vomited on the floor. It was all bile since he hasn't eaten since last night at 5:30. Then he was back to his normal self, ran back upstairs, and waited excitedly for his food. He ate most of his food, played around a little and is now laying down. All normal stuff except for the vomit. His nose is cold and wet too. I can't figure what made him sick. I did find an ancient bone that he dug up in the yard yesterday. This bone has to be over 22 years old. Chief was our last dog, he never had bones outside. Wolfie never has bones outside, and we have lived here since 1988. I wonder if that bone made him sick? I didn't know he had dug it up until this morning when he went right to it. Any ideas?