Dog Flu Treatment

were moving to a diffrent countrie and our verry large dog is way to expansave to take with us. The animal shelter here has had manny out breaks of dog flu and has put down most if not all of the dogs they have there. do we just go and drop her off or put an add in the paper and see what we come up with. We want to be picky with the home she gets she is an awsom dog and i dont want her to go to some crap place. what to do?