Ok, so my older rescue cat is driving me crazy. He's always puking. His health seems to be fine otherwise and the vet doesn't have any answers. He just turned 11 and we haven't had him for a year yet, but I'm losing my mind with him. It seems to be that he's gorging himself on food. He'll plow through half of his food and throw it up pretty much while he's eating and then go right back to eating. There are no obstructions, his blood was normal, he's playful, uses his litter box, etc.
We've tried wet food and dry food. Cheap food and very expensive food. Food for hairballs and sensitive stomachs. Grain and grain free. He'll even puke up treats when I give them to him because he'll eat them so fast. We've even tried some suggestions online and have started feeding him on large trays and large paper plates where the kibble is spread out and he has to work around the surface to eat. It works half the time.
This isn't my first cat. I've had 9 cats in my life time, with all sorts of issues, but this is a new one to me.