[John T]

Laura, first of all the Blue Buffalo has been causing a lot of part problems with dogs and their digestive systems but your problem sounds a little more suspicious than just the dog food. I would try giving him some simple boiled chicken and rice and if he throws that up then there’s something else wrong. I hate to say it but it almost sounds like he may have some type of blockage. Have they done an ultrasound? But again, the first thing I would do is try some boiled chicken and rice and see if he holds that down if he doesn’t get to the vet and have them do an ultrasound or X-ray. If he is the kind of dog to choose and puts everything in his mouth he very well could’ve swallowed something and has a partial blockage. Nothing to play around with. Good luck