No need to go to your corner @Blooie. I had the same thought when I read @SandyRiverChick's last post.
While I would use an old pad on myself, I wouldn't use it for an MHP. If there ARE any problem wires, I would notice it if the pad was on my back for a period of time. No way I would notice anything was wrong if it were in some other room, or in your case and mine, outside where it is unseen other than a few times a day. Mine is currently sitting out in the community nest box set on #2 (of 6) under a dishtowel to keep they eggs laid from freezing.
Were the chicks not going into their cave? What does your setup look like? You mention damp and cold. It might help us make suggestions if you put your general location in your profile.
While I would use an old pad on myself, I wouldn't use it for an MHP. If there ARE any problem wires, I would notice it if the pad was on my back for a period of time. No way I would notice anything was wrong if it were in some other room, or in your case and mine, outside where it is unseen other than a few times a day. Mine is currently sitting out in the community nest box set on #2 (of 6) under a dishtowel to keep they eggs laid from freezing.
So my CX have been doing quite well except for a little transition stress, woke up at 6:30 and cheked on them and all was fine, by 9:30 I went out to check again and 7 were flat out laying lifeless. it was a bit shocking. I scooped them up and got them inside to see if any would come back, only 2 revived. I'm not sure what happened except I am brooding outside, north face of a hill, great for summer but apparently it's more damp and cold than they can handle in the first day or so. I'll have to make a few notes for course correction next time.
Were the chicks not going into their cave? What does your setup look like? You mention damp and cold. It might help us make suggestions if you put your general location in your profile.