Donkey farrier, Koren, was over last week to trim some little hooves and happened to tell me about another of her clients making carrot ice cube discs for her equines. In the blasted heat. Shazaam! An outstanding idea.
My first attempt used a bowl that took up too much room in the freezer, but was chosen for its large bottom surface. And it was plastic making for easier removal (disclaimer: I've been slowly eliminating plastic storage from the kitchen but this big bowl remains).
I popped it out into a donkey bowl and at first no one took much interest. Until I sprinkled a little grain on top. (you can see it's still whole at this point)
The clever one in the group, surprisingly it was Luigi, took his paw and poked at the disc, conveniently breaking it into more manageable pieces, and exposing a little more of the carrots. By the way, I intentionally made it rather thin so the donks could see/taste/smell the carrots more easily.
And now the interest builds. More heads came into the bowl. Oh, yes, rest assures, four heads can fit around one bowl if the treat is captivating enough.
So now there are two setting up in the freezer -- smaller bowls but still lots of carrots.