Strange Shih Tzu Behavior
We have a beloved 2 yr. old Shih Tzu who's been a joy. We take him to a local dog park at least once if not twice daily to play with his friends, who are mostly bigger dogs, but he gets along with them and 'puts them in their place' when necessary.
About a month ago, he started a bout of throwing up and diarrhea. We took him to the vet who did a blood test, took x-rays and found nothing. He prescribed some medicine for both problems, along with an antibiotic, and put him on a diet of rice, which he tolerates well.
During that time, he would have nothing to do with us, and stayed pretty much to himself. When he got a little better, he returned to the dog park and seemed to be doing fine once he got there.
The last two times we thought he completely recovered, he had relapses with just diarrhea, and we don't know what causes this. His diet is the same as it's been, but we know there's a problem when he starts hanging out by himself and doesn't want to be around us.
Does anyone have any idea where this behavior comes from??
He does like to go for walks, but his usual joy at this is sometimes tempered by the behavior I described above.
Any help you can give us would be greatly appreciated.