Sookie, my English mastiff, is almost 6 months old. Today she started vomiting her food back up and has been fairly laid back all day, giving me the clue she is not feeling good. I"ve been trying to change her food, same brand, just from puppy to adult... and today was the first day I tried, so maybe that is the culprit? Should I wait it out, and keep trying the food? Or should we visit the vet and see if there is something else wrong?
