heating pads, like any electrical item, can cause fires if the cord gets frayed or the covering on the wire gets cut. Most heating pad fires happen when the interior wires get broken which can happen if the pad is folded hard, or if it gets too old and gets brittle.We are getting a box of chicks in a couple weeks and I'm also in la area, lows in the mid 60s lately. I am wondering if I could get away with using a seedling mat or two with some sort of "cave" inside our coop. It does seem like it will be so much better for their development to just start out in the coop. PS no other chickens to integrate with.
Despite what everyone says, the heating pad touching plastic wrap and blankets makes me nervous. Those pad have a shut off valve because they've killed lots of people in the past setting beds on fire.
Personally, I think the risk of a new heating pad, used gently (don't crimp it hard with clamps, watch those bungee cords, don't fold, etc) causing a fire is pretty darn low, and definitely lower than a heating lamp.
In case anyone is interested, a great, safe way to store your pad is to hang it from a skirt or trouse hanger - the kind that has built in clips that you clip to the edge of the fabric cover. Hang it up somewhere out of the way, and you won't have to worry about bending and breaking the interior heating wires.