As far as the training aspect:
Find a trainer. The dogs need to be worked away from home. Training is secondary most important thing after nutrition in being a dog owner, in my opinion
If that isn’t an option, here a few tips I can give out:
Exercise is important. As much as it’s important, even more important is the bond that comes from walking with you. Treat them for good behavior.
Resource guarding can be tricky, but never do anything physical to your dog because of it. Take away what they are guarding, so the punishment is not getting what they want. Reward for good behavior.
Don’t let her out without you. If she chases kids, she goes back on the leash, or inside the house. However, she needs to be able to run and play, so it depends what the chasing is, and it may be the kids imitating inappropriate play and encouraging it. Don’t leave her with kids alone.
How long has she been biting? Is it aggressive charge biting, or is it nipping? play biting? Different responses for different things.
