[Sam-N-Tony]

Ok, even at that age they know what they are doing and are doing it intentionally. I would suggest maybe not having the kids too close to each other just in case fd does actually hurt bd.

Honestly, that is pretty age appropriate and of course she has some jealousy issues because there is another child in the home very close to her age. Especially if she came from a home where she was an only child. She now has to share your attention. Make sure you give each child individual time, so they understand that they are still getting positive attention from you.

This might be something that will work itself out. Usually if you put a child in a day care setting they go through an adjustment phase where they will bite, hit, push and eventually will stop.

Even at 19 months they understand a lot. So if she hits your bio, then bring all attention to the child that was hit. Hug and kiss their boo-boos and seem very concerned. If the fd does not got any attention she will realize that everyone else is getting attention but her. And when she is appropriately playing with your bd, then praise her, I like that you are playing nice with __.

It's only been a week, she should ween out of it. In the meantime keep an open eye at all times.