I would use the heater that is used in bird baths. Just make sure it is
secure in the tub so the cats won't knock it out.
Gail
"Mr B" wrote in message
...
Howdy,

We have our stray cats that we take care of and are looking for a way to
keep their water bowl from
freezing. I have built them a house to live in which they like, but it
just dropped to the 20s in
the past day or so and their water bowl freezes.

I'm guessing I could get some sort of thing made for Bird Baths but was
wondering if anyone had
anything specific they have used. I'm looking for the Cheapest solution I
can find. Any
suggestions woudl be great.

Thanks.