Innoculations have been known to cause hairloss at the injection site. It should grow back but it will take some time to do so. I am posting a site for you to read regarding hair loss in dogs. It covers reasons other than due to injections so read it thoroughly. You can put some bag balm (you can buy it at your local drug store) to keep the area moisturized and speed the growing in of the hair. Hope this helps
http://www.vetinfo.com/dhairloss.html__________________
**Although a deposit was put down, I, PERSONALLY, don't get paid until you click the
Accept button..your deposit remains with Just Answer**