In the beginning, I would dry them, then heat them in the microwave to "kill any possible bacteria", then put them in a plastic bag and crush them with a rolling pin. Now, I don't even rinse them. I figure that any albumen that dries in the shell is just a bit of extra protein. You can tell that I've relaxed my standards a bit, yes?! Keep it simple.Sounds better then hand smashing them
agreed.Probably any time. It's not as high as level of calcium as oyster shells. Maybe just put it in a container on the side for now some will need to start building calcium if they are possibly earlier layers. I read 16 weeks is the best time to introduce calcium.
I agree thought I don't take much extra time in she'll prep. I rinse then quickly then leave them in a bowl on the counter till is full or bothering me. Either I smash them a few times with a cup or just dump them in the run and stomp on them. If I take them out right away I usually don't even rinse them. They don't have to be finely ground just so the chickens don't get the idea that is an egg. Honestly my girls seem to prefer larger chips rather then powder.