Before things started to stay below freezing, I was able to give the bird bath a thorough scrubbing and add a bit of water. Which froze overnight, so I added more in the morning.
The cats just can’t get enough of that. Here, the top layer has frozen, so there are bubbles moving underneath that entrance them, but even while the water is freshly added, they’ll jump into it, getting their paws all wet!
They’re going to have to stop doing that soon, or they’ll get frostbite!