I don't have any strong reasons as why the kids can't feed the puppy, but she's still learning to sit and stay sitting and not eat until I tell her. We've only had get a week and she's just a baby so she hasn't stopped rushing at the food bowl as soon as I put it down yet. I would have to restrain her while the kids put the food in the bowl/put the bowl down.
She's not allowed on furniture, she has to wait for everyone else to go through doorways and she sits outside and waits for us to eat before she gets her food and she's pretty good about it all. I'll get the kids to do up a roster and they can all take turns feeding her from now on.
Red Cabbage - I'll get some pics sorted for you soon.