Well, I guess I have a different view of things. Yes, I would definitely be upset at seeing my babies tossed around, and would probably do some yelling at the time, but rather than taking the "create a fortress" route right off, I would try to help educate the children. Obviously they are not getting taught proper behavior or how to appropriately treat/respect animals or other people's property. It could be a true gift to these children if you were to explain why you were so upset when you saw what they were doing, bring them over to your place and properly introduce them to the chicks, explain how fragile they are and show them how to behave around them. Tell the children that, while you don't want them over at your place all the time and especially when you're not home, that you would be happy to invite them over some times to see the chicks and maybe teach them how to care for them. Yes, you have to create some very clear boundaries, but in doing so you're teaching them to respect others, respect animals, and also showing some respect and compassion to them. I guess since I work for a mentoring program for youth I'm always looking for ways to help them. So many children are simply labeled, shoved aside and left to fend for themselves, when it truly takes very little to make a positive impact on their lives (yes, I know there are those for whom nothing will matter, but they are few). As the saying goes, "It takes a village to raise a child" and how much better off would we be as a society if we truly believed and lived this. Just my two cents.
Liz