We won't be trimming here. Naughty birds will likely be culled, if pecking becomes a problem. We aren't going to overload our coop, though, to try to keep that in check.
As in de-beaking? I don't think it's neccessary in a backyard flock, and I hear it's quite painful for the chick. That's more of a practice for commercial poultry farms in which the chickens barely have breathing room.
I would guess you are just talking about "maintaining" not the fore-mentioned "snipping"?
We HAVE to trim/maintain a couple of our girls' beaks. They start to look like parrot beaks and we can clearly see that they aren't able to efficiently eat. I'm not sure why some of the girls' aren't able to maintain them on their own, but they can't/don't. Maybe we don't have enough rough surfaces for them to wipe their beak on?
We use the little device they use for taking care of dogs nails. It is basically a dremel with a little sandpaper disc that spins real fast. We found that if we used a nail clipper that the beak would sometimes crack or shred.
We just wrap them in a towel with only their head sticking out and gently but firmly hold them. The second person grabs their head to cover their eyes and hold their head still. The second person then does the grinding.
After the spa treatment - beak fixing and nail trimming and feet cleaning - we always give them some really yummy treats. Then we can also watch how their "new" beak is working for them. They never hold it against us this way!
IMHO, Debeaking is a cruel practice. A chicken uses its beak to feel somewhat similar to how we use our fingers. Even more so, in that, chickens discern or feel objects they pick up with their beaks & this is how they determine whether to eat it or not. A chicken depends on its beak. Chicks would not need their beaks trimmed so they would have to be talking about debeaking.
I don't know anyone who debeaks a backyard / homestead flock.