kina grose question?

my dog got a hold of a squirrel somhow…. i got it from him and put it in a safe spot… he has made small movements like hopping once and the falling again… he is breathing and his eyes are open… i have noticed a wound on his leg that is infested with fly eggs and more fly eggs in his nose…. i have been fanning off the flies but when i stop the flys return and continue to lay eggs… i think my dog must have found him on the ground instead of catching him in a hunt… my only guess is that the squirrel fell and is now unable to move much… i thought his spine was injured at first but i’v seen him move his body but maybe his neck is broken and his head cant move… i havnt yet seen him move his head…. he must have been down for a while since so many fly eggs are in him… any suggestions? will he live or are the fly eggs a sign? don’t say things like it’s just a squirrel… b/c iv heard that enough