I had to move my house silkies pen into the basement from the mudroom since the heater out there broke. It's 28 degrees F out in that room now and the three-month-old chicks have never experienced anything colder than about 60 degrees F. They're living on fleece on a tile floor now and my husband doesn't exactly want me putting wood chips (he hates the smell) or sand down in his man cave that he temporarily gave up until its warmer. So, I'm looking for options for entertainment. They were on sand in their previous pen. I'd scatter scratch in it for them to find and they could dust bathe. They spent all day just foraging in that sand like chickens do. Well, it's hard to dust bathe and scratch on fleece, unfortunately. Nor can I hide bits of food in it for them to dig up. They've tried foraging behaviors, but I've found when I observe them, they're just sitting or standing around if they don't happen to be eating. I don't want them to get bored. I've found they like pecking those little plastic golf balls around and the kids put a parrot toy in there that's way too big for our parakeets to play with in there they enjoy throwing and kicking it around. What else could I do to make sure they're entertained? How about hay to scratch in? I've heard it can cause crop impaction, but will a little bit at a time be safe?