It is kind of you to worry about the little squirrels. I'm not sure what effect Animal B-Gon has on wildlife as I've never used it but if you could find a container you could read the effects.

You might be able to talk to your landlord. See what animals he's trying to run off.

I don't know how to tell you to quit worrying because I worry a lot about things and can't seem to stop either. But I wish you and the squirrels well.