Did he pick up something in the cattery ?
Possibly it is one of the things worrying me. I have a flea collar on him as that was my first concern but can see no flea dirt. But for several mornings in a row he has vomited within a couple of minutes of heating breakfast. No change in food. He is running around as normal and is hungry. Keeps the rest of his meals down. He was OK this morning so I will keep my eye on him.
EATING not heating!