I have a chihuhua and i noticed he's been throwing up . i changed his food about a week ago, i was just wondering if that can be the reason or i should take him to the vet asap

Take him in asap he is too small and will dehydrate very fast

Get him to the vet

Get him to the vet asap

Asap sounds like your dog is going to be really dehydrated get him to the vet

It could be the food but dogs dehydrated very quickly I would take him to the vet ASAP

New food usually just causes diarrhea, in my experience, & what my vet told me. But I'm NOT a vet. I would call PPP