Neosporin is okay, but better yet is EMT Gel. It provides a collagen matrix for new skin to grow.
Last year we had two hens get into a battle royal over a clutch of chicks. The hens were unhurt, but they totally scalped some of the chicks. We actually did an experiment, where we put Neosporin on some of the chicks and EMT Gel on the others. It was clear within a few days that the EMT Gel chicks were growing in new skin much faster, so we switched them all to EMT Gel.
It is a lot more expensive than Neosporin, but it's totally worth it when you need an animal to grow in new skin. We've used it on our dogs, too. It works better than anything else we've tried.
You can get it at many tack shops and feed stores, and at lots of online vendors.