I thought peanuts were peanuts were peanuts so I could safely buy the cheapest. Well, I was wrong. These peanuts have gone all mouldy, so the birds won't eat them. So I have chucked them out and I will go back to my previous supplier.
I have found this to be an excellent heated pad. It is hotter than its rivals, so my elderly cat unfurls and luxuriates in the heat. It is larger than some pads, so make sure that it will fit in your pet bed (it has to be flat, not folded).