They seem to love them but, I'm not so happy with the way I've been doing it. I take the frozen plastic bottles, place them all in a big trash bag and put it in a shady corner of the run. At the end of the day, I remove the bottles from the bag, throw the bag away, (it's way nasty as they like to sit on the bottles) and then refreeze the water overnight. It's bothering me that I'm using so many trash bags. Is there something else you've come across that doesn't involve all those trash bags? I love recycling and hate waste!