Is it possible to treat for mange (with ivermectin or anything else) if you are unable to pick out the affected critter? I live in Eastern NC, my backyard borders on woods and we have many squirrels that visit and get their food regularly. We have noticed a few with rather ugly looking patches on their sides and from what I have been able to research online, it appears to be mange. The treatment seems to be a very specific amount of ivermectin given several times over a month period of time. If you have many squirrels and no way to get the needed meds to the specific animal, can you put the medication on a larger amount of food that all will get? Thanks, Jeff (I am grasping at straws for a way to help my little friends)