I have a 4 yr old female Queensland Heeler/Australian Shepherd mix. We feed her two cups of either Iams or Pet Gold dog food a day. We only occasionally give her a treat of raw vegetables or slightly cooked meat. Anyway, the last couple of weeks she has been throwing up once a day. It comes out looking like a really deep yellow beer. There are no chunks inside, just a yellow clear liquid with some foam to it. She has always puked like this from time to time, but only about once a month, and usually there was some partially digested kibble in there as well as the 'beer'. I haven't taken the dog to the vet yet because money is a little tight right now and we haven't found a vet that we trust or are happy with. What's going on with my dog? Any help or suggestions? Thanks!