Yes! In fact we go in through the a special side door too. We go to a special isolation unit where there is a large dog kennel cage, shower/bath area, and seperate toilet and sink. Items that go into that area, stay in that area or are decontaminated as they are passed back over the threshold. Even the bottoms of my shoes are deconned.
He will continue to shed the virus in his urine, feces, saliva and bodily fluids for several weeks.
You might want to read the link in my first post from yesterday. The virus itself can survive nearly a year on surfaces.