Hello! My dobie recently had a staph outbreak on his skin, little scabby spots all over under his hair. After a vet visit, couple medicated shampoos and sprays, the scabbing fell off and now he has a bunch of small but noticeable bald spots all over his cost. I had him with a dog sitter for 10 days and I saw that the spots looks healed now. How long will it take for the hair to grow back in these places? Thanks in advance.