I've read about and seen videos on sawing off the lid that way. Looks like a really slick trick, which I will do, probably on the next box. I haven't figured out what that next box will be, but it may be while.
It is Spring and there is yard and garden stuff to do that can't wait. My daughter raises chickens (in my yard - about 30 of them) and told me today that she wants me to rototill the chicken pen. She has been spreading straw all winter, in part to add carbon to the ground but also to give the chickens some relief from the snow. It will be a nasty job. Chickens are one of the grossest animals I've ever been exposed to. But, should I want to grow a garden in that ground after she and the chickens move out, it will be a killer garden.
In the past, when she had incubated eggs in quantity, to raise new chickens to sell, she had set up brooding pens in my garage. Now that I have some woodworking tools to play with, I don't want to give up the floor space for the pens. She said the chicks can go outside in brooding boxes with mat heaters, so if that works, I'll be happy.
"If you want nice, clean, fresh oats, you must pay a fair price. However, if you can be satisfied with oats that have already been through the horse, that comes a bit cheaper."