Wednesday I came home from work, found my mini stud standing in trees gasping and wheezing for breath. When I teathered him out, he walked listlessly about head hanging down. Then he laid. When vet came she examined but could find nothing wrong. Took him to the vet clinic next morning. Total exam and still they could find nothing wrong. Gave him an anti inflammatory and vitamin B 12. He still shows no signs of improvement. Please help.