Three times in the last week, our dog has vomited unexpectedly (ie. we weren't driving and he hadn't been eating grass) and each time it has been bright (bright) yellow and slightly liquid/foamy. I haven't changed his diet at all, and I'm definitely not embarking on any vegan diet experiments, but the answers to Dog vomiting yellow/white foam since being fed vegan food seem to suggest this is acid reflux.
Today, he was trying really hard to get my attention and I was trying really hard to work and eventually he deposited some diarrhea on the bathroom rug (not a bad place, cleanup was straightforward, if foul) and then when I realized what was up and took him out he threw up within a block of our house and then dragged me to a grassy median a few blocks away and worked really hard to squeeze out some more dribbles of diarrhea.
Since then, he hasn't been eating or drinking. His nose is dry and he looks miserable and he won't play with me. It's been a few hours.
I'm not sure what might be going on. The only thing that has changed in his diet is that we have been giving him some chicken hearts sometimes for treats. I think my husband gives him more than I do -- I chop them pretty small. But we've had them for several weeks (they're cooked and frozen, we thaw one or two at a time and chop them up) and he only started throwing up in the last few days.
Is there anything I can do for him to make him feel better now? I've used pumpkin for soft stools in the past. I don't want to start giving him a bunch of new food that's just going to end up making him sicker, but if there's something I can do to help him feel better I'd like to do it.
Should I give him some squash? Or leave him be for now?
UPDATE: He's fine. He was so energetic on his night time walk that it didn't seem necessary to take him to the vet. I'd still be interested in knowing more about how to tell when vomiting is severe enough to warrant veterinary care, however, and whether there are foods that are better or worse for a dog with an upset digestive tract.
He had another bout of diarrhea on July 8, and again this week, July 22. Two weeks apart to the day. The timing still seems bizarro, but on our vet's advice we took his food away for the night and gave him only rice.
Still seeing how this plays out.