I use a warming box whenever I'm not at home or if I want them to sleep after gorging off Halo. It's a Walmart special, clear and large enough to accomodate a good sized litter. I put a warming pad on the lowest setting under the towel and they fall asleep really quickly. They fall asleep faster if you put a towel over top of them ... it's like a magic spell. I take the towel off once they are asleep so they don't over heat.
This is Leeloo seeing what all the fuss is about. Halo has had a change of heart and now lets Leeloo have a sniff quite often. Leeloo was very concerned when I was trimming their nails and they were crying in frustration. I think she will make an excellent puppy nanny.
This is what I found when I got home from work today, besides Halo having escaped her crate and ripped up a dog bed to make it more 'comfortable'. Guess at which end is the heater.