Quote: The black one is this:
http://www.tractorsupply.com/tsc/product/farm-innovators-heated-chicken-mat
the brown one is this:
https://www.jefferspet.com/products/k-h-thermo-peep-heated-pad-9-x12
I think they probably don't get as warm as a heating pad, so they might not work very well in colder climates.
It might be warm enough, but the first review on the TSC site says they don't think it would work well for chickens-- they don't think any heat is generated unless there is weight on the pad, and I myself own a pad that is exactly engineered like that, for pets like cats and dogs. In any case, I wouldn't use this type of pad for MHP because it doesn't have the features that are required to make MHP work: variable heat control and always-on cabability, combined with "comes back on by itself if the electricity goes off". Plus the second one says it's 9x12, which is small. For less money you can get the recommended pad with the features needed:
https://www.amazon.com/gp/product/B005NZ66KU/ref=oh_aui_search_detailpage?ie=UTF8&th=1