My 2 year old golden doodle ( golden retriever and poodle mix) went from extremely healthy to extremely sick in a matter of hours last week. We woke up to him vomiting his food from the night before, and then continuing to vomit or regurge bile/fluid for the rest of the day. He also had diarrhea. We took him in and they gave him an iv under the skin and sent him home. He declined and became very lethargic. Now, after 5 days, he has been in the hospital the whole time and it seems his stomach and intestines are not draining the fluid, but we are not sure why. We have done x rays, multiple ultrasounds, an endoscopy, biopsies, and even exploratory surgery, and everything is normal except the villi in the intestines don't seem to be a lively as usual and the intestines in general are under active when the DMV took them out. There is no blockage, and they are swollen a bit, but mostly filled with gas and fluid.
We have two days to let him recover from surgery and see if the new biopsies show anything, but if we can't find anything, we will have to put him to sleep. Please help, we are so upset and confused with what is going on. He seems to be the best right after they drain the fluid from his stomach, but then as it fills back up, he becomes lethargic and sick, continuing to regurge liquid an uninterested in eating or drinking. Te vet is now saying maybe mother nature will turn things around, which seems to be our only hope for him at this point. Any help is appreciated.