The vet was very informative. The culture is still culturing but so far had normal contaminants. Some horses may still develop secondary infections but so far not ours. Since it has been over a week the vet seems to think in two weeks our horse will not be shedding the virus since his temp is now normal. The horse has only coughed once or twice so that is good news. He said over the weekend take him for a mile trail ride. If he coughs once or twice at the beginning of the ride then not again it can be good for him to do mild exercise and expand his lungs. If he coughs during and after the ride then that is a whole different scenario and then we may not want to take him on the trail ride in two weeks and he would need more rest and watch him. Ahh horses, they can be worse than kids sometimes.