I have an 11-week old Catahoula pup that has a dominant personality. It's taken a lot of patience to get her to do pretty much anything, but we are seeing improvements daily. She's a very intelligent dog! One thing I'm still having a problem with is the nipping/ankle biting. I redirect her chewing/biting to her chew toys, and this sometimes works. However, it doesn't always work, and her teeth are quite sharp. Is there anything else I should be doing to nip this behavior in the bud?