I have an 8 yr old Boxer, 4 days ago, he was playing ball, going on walks, etc, suddenly he has stopped eating, been vomiting clear mucus with red or brown specks in
it, won't even get up when anyone comes in
door. He has never had any health issues. I took him to the vet and was told he has some kind of infection (but no idea why or from what), he has a high white blood cell count, but that was the entire explanation.