em: I am seriously starting to believe that those that have issues when hatched, maybe have more wrong with them than it first appears. The 3 that seemed to have struggled with hatching all ended up dying. My one with the foot issue-When I had first found her, mom was off the nest with the other 3 and had abandoned her. I have heard that when a hen abandons a chick or egg (shoved out of nest etc) there is usually something wrong that the mom some how senses. I have one other that hadn't completed absorbed the yolk and had that and umbilical cord for awhile. Even though this one seems to be thriving now, it is smaller than the others too!
As far as the heat, it is all a learning lesson and who knows-there might have been something else wrong with her. After all the others made it just fine! I have these little re usable heat pack things I keep around for either injured chicks, transporting chicks etc.....very convenient. Also, you can always put hot water into a Ziploc, double bag it and put with the chicks if your in a fix. So how many do you now have? And again I am so sorry for your loss with Henny Penny!