I agree with you. If you can't provide for your animals, you shouldn't have them. Yes, I understand your need to heat the older birds. You might want to invest into some of those hot hand, pocket warmers too. That way you have a source of heat for them, if the power goes out. I have a friend that has saved more than one hatch when the power went out, using them to hold the heat, until her power was restored. They work.
On the hand warmers, how would you use them for adult birds? I guess you're talking about putting them into nest boxes? Also what kind in specific are you using?
I did pick up some chicks once in KY (I prefer to drive rather than ship) and they put the warmers in the box with them. I had just planned on keeping the heat in the car high. I'm not sure what she used but they were a soft cotton-like material.