I feel for all of you guys having this late winter weather. Spoke with my MIL yesterday they are in southeast Michigan she seems to think that she may need elevated garden beds as well as soon as the cold weather passes. It looks like my tools and I may be going on a road trip. I guess that goes back to marrying people with certain skills, I suppose I'm the carpenter in the family even though it's not a trade I've utilized for almost 20 years outside of work for myself and family.
My chicks are only two weeks old and I'm about to make the third adjustment to the MHP. The temperature in the brooder this morning was 65 and they were all outside the front of the cave. I think I'll raise it another inch and leave the heat setting alone. The air temperature in the cave is between 75-80 but the chicks are feathering out pretty well so it may be just a little warm for them in there. I'm not paying much attention to the temperatures when making adjustments I just watch the chicks and when they seem to like the setup I see what temperatures we ended on. I think the biggest change in my thinking has been that when in doubt go with the cooler temp. In the past I would have warmed them if I thought they might be the slightest bit cold and I in retrospect I think I kept the chicks way too warm.
I'm going to set the camera up again and see where they sleep throughout the night. I'll try to grab a clip or two to share. If they keep up this progress they will most likely move outside about a week ahead of schedule. I had planned on moving them out at 4 weeks but honestly I think they are ready now.
@Blooie has converted me to the MHP method and I'm pretty sure my next chicks will be started outside.