No, this is the older girls. I have one of those feeders too. (yes, I have 3 that's why I don't want to buy another one... actually 4 cause there's one in the chick house too) They don't spill to much with that one. Maybe putting a piece of plywood under it would work? I guess I could just fill it less too.Is this the feeder for your new chicks that you are talking about? Maybe a heavy piece of wood? Our feeder is the top load kind from TSC. It has different levels to restrict to much feed being scratched out. I tried pellets with the girls and they scratch too much out, so I switched to crumbles. Mine is on their patio and not hung up and the feed does accumulate a little on the wood there, but I have a few that like to clean it up for me, so no mold there.
About the poo poo: Make yourself a compost bin and add in the chicken poo too. It'll turn into great garden soil if you mix in some kitchen scraps and leaves too.
I have 2 compost bins and after filling the one with poo and kitchen scraps and letting it sit 6 months or so it turned into beautiful soil for the bushes! But we actually have to much poo for even 2 composting bins. Just wondering what city folk do with all that poo. Never thought about it before!