DID YOU KNOW?... That a case of Demodectic mange can sometimes look just like ‘flea-bite’ dermatitis? YEP... a Rottie can lose its hair around the rump and inside of the thighs from chewing and if you have fleas you might just think that the flea is the almighty culprit... BUT, on the other hand if you don’t have fleas NEVER completely rule out he mangy little critter called the Demodex mite. Maybe you should check for this mite before running expensive allergy tests.... just a thought. Talk to your veterinarian if your Rottie is chewing and developing alopecia (hair loss).