I am supposed to get my chicks this week .I am getting them from a local feed store so no shipping involved . Since it is supposed to be 0 on the pick up day I thought I would put some hand warmers wrapped in towels in the small animal box ( the kind you get hamsters / g-pigs in from petco) that I am transporting them in . Along with a heating pad for under the box and the heat in my van . Does this sound like it will be o.k. for the chicks until I get them home and put them in the brooder?