It's best to use redirection with one-year-olds, they can't sit in time out nor understand it. So you're doing great with redirecting the child's behavior. Also, I have found if I go to the hurt child and console them and comfort them, this teaches empathy and that behavior such as biting is hurtful.

I also would keep a log of their behavior and consider talking with the parents to see if something could be going on such as a loss of a pet for example that could be triggering such behavior.

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