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The heating pads use low wattage, 20 watts for the small to 60 watts for the large size pads, I have two that are always plugged in and have not notice any increase to our bill.I've been looking at them, but we used to heat our ornamental pond and the electricity cost was killing us.

Whether you're a "cat person" or not, I find this "A Cat's Diary" on-point and funny:
Excerpt:
DAY 761 – Today my attempt to kill my captors by weaving around their feet while they were walking almost succeeded. Must try this at the top of the stairs.Excerpts From A Cat’s Diary
I'm fine with this setup seeing what I see.

So there I was minding my own business watching my son’s last middle school football game being played at one of the local high schools. Now it’s an area of town you try to avoid in daylight and certainly at night, but there we were in the stands when this cat comes wandering through with his head cocked sideways, apparently because he’s deaf and blind on one side. He looks like he hasn’t eaten anything for a month. Of course my wife starts feeding him nachos and cheese since that’s all she had and starts taking about taking him home, you know, just so we can take to the humane society in the morning. I said hell no that cat ain’t coming home with us, and there he was stuffed in a cardboard box screaming bloody murder all the way home. Now here we are 4 years later with our pictures pasted on a couple Father’s Day coffee mugs and the calendar in the kitchen last year. We have 3 dogs at the moment, he thinks he’s one of them, chases them around the house all the time and just generally runs the show around here. He wants nothing to do with getting in your lap, doesn’t knock stuff off intentionally like your typical asshole cat (remember he is half blind and not always graceful) but just follows me around seeing what I’m up to. He’s my buddy, I guess I’ll keep him.Wait for it...