Good morning all! Just went out to open my pop door before leaving for work, and the latch was frozen! We have a sliding / bolt latch type, and in the evening I close the door, slide the latch, and clip the bolt snap at the opposite end of the latch so no clever critters can slide the latch to open the door. Well I was able to unclip the bolt snap, but it took a few minutes of me trying to warm the latch with my hand before I was able to get it unstuck. This was our first fairly cold night with a really good frost (into the high 20s). Any suggestions on what I can do going forward? This morning it wasn't bad, but when it is 10 or below I don't want to be out there freezing my butt off (not to mention my hand!) so I can get the latch undone! Is there a different type of "lock" I should use for the pop door? The coop is big enough that they have plenty of space if they can't get out, I'd just like to give them the option. In the past when I've experienced this with locks we use on our dog kennels, I've used one of those fireplace / grill lighters on them to thaw them out, but obviously don't want to do that with this latch because it is up against the wood siding of the coop! I guess that brings up another question. For those of you in cold areas, is there a certain temperature at which you draw the line as far as letting the chickens out? My dogs are Akitas, which LOOOOVE the cold and never seem to be bothered by it, but I guess I could use them as a guideline, in that if I think it's too bitter for them to be out in their kennels then the chickens should stay in the coop? Thanks!