My 11 week old puppy keeps vomiting. He was fine for a week after I brought him home from the breeder, and then he was sick three times in the afternoon, a few hours after her lunch. It was kibble - getting progressively more digested/mushy with each time she was sick. He was acting okay, maybe slightly subdued and quiet but still happy and playful. I took him to the vets to be on the safe side, and they said everything seemed normal (no bloated or painful tummy, normal temperature) and it was likely a stomach bug. It started 4 days after his first visit to the vet/first vaccine. He had an anti-sickness injection which worked.
Around 15 or so hours after the anti-sickness injection wore off she was sick again. The same situation - she kept his breakfast down, but threw his lunch up several hours after eating. I took him back to the vet and they have given him an anti-sickness injection and said it may be a stomach bug, but they may need to do further tests if he vomits again once the injection wears off (which it will be doing now).
Does anyone have any ideas or suggestions of what it may be? I'm not sure if I've been overfeeding him as his kibble is based on his expected adult size, and as he is a mixed breed I'm not sure how big he will get. His poos are normal, and he has a good appetite. He's not been out on the ground anywhere apart from the vets as he isn't fully vaccinated yet, but has been carried around places with me. He is wormed. Eats 3x a day (I've now changed this to 5 times a day upon the vet's recommendation).
I'm not sure whether to just pay for a blood test and ultrasound scan to be on the safe side, or whether to wait and see if he starts vomiting after this injection has worn off?