This is probably the wrong area for this question but here it goes. I have heard of people talking in reference as what to use as tiring's, my question is what is a tiring and what is it used for.
Life is hard, it's harder when your stupid. - John Wayne
Yeah, it is the wrong place, but I'll let one of the moderators place it correctly as they see fit.
Tiring is the term used for a falconry chew bone. It can be a part of a wing with most of meat removed, or the like. There shouldn't be more than tiny bits of meat. The point and use is to concentrate the bird's attention / focus on something interesting in front of it rather than fosusing on and fixating on a possibly negative situation. A side benefit is, while working on the tiring, the bird is strengthening muscles, keeping the beak sharp and if not completely manned, becoming more at ease on the fist.
It's even calming for the falconer to watch their bird, even if indirectly, pulling on a wing joint, flicking feathers, happily shifting its stance and grip.
Good question, and I hope I've answered it. Terms like these are usually covered in good books on falconry. Gather as much of a library on the subject as you can.