Yes, you dont want to cover it because it needs to be exposed to the air. It needs to dry out, and scab up, in order to heal. If you cover it with gauze, even lightly, it wont get the chance to scab up. You might want to put an E-Collar on her. (It is one of those huge cone things). She will also be miserable with it on, but she really will have trouble rolling over. She can lay down inside, and run around inside, but wont be rolling over on your carpet. She wont like the E-collar either, but it will keep her from licking the wound, and will also keep your collar clean. And in a couple of days when the wound has healed a little more, you can take it off. Or take it off when she sleeps. Pet Botanics E-Collars
. Good luck! And I hope your baby feels better!
Also, there are supplements that you can give your dog every day to prevent dermatitis and hot spots. Try something like DermCare Fatty Acid Capsules for Dogs
. My dog had AWFUL dermatitis until we started giving her a fatty acid supplement (it has to be made for dogs. We tried Human supplements and they didnt work as well.). She rarely scratches now! It totally helped her