Your dog is going to create what is called an 'hotspot', a spot of constant chewing. You first need to make sure mange (sp) is not an issue. 'Hotspots' can be treated w/ bathing and spray.
My Dog Has Been Biting His Leg & The Hair Has Come Off, Not Sure If It's Cause He Likes Too Lay Out In The Sun A Lot! I Think It May Be Dry Skin Maybe. Thanks,can You Help, Niecole?
It could be a potshot or a flea or tick infestation, especially if the dog lays on the ground outside. Take a dog comb and run it through it's fur a foot or so away from affected area to see if you flush up any fleas.