I hadn't order from there YET. I was just looking last night at some of the aluminum ones but I think the numbers would be to hard to see. Other then the numbers not being on there, I was thinking of going with the larger zip ties. I don't think they could pull them off. I would just wait until they got full grown to put them on. The size 12 works fine until they are about full grown. lol I'd just put a couple on each bird with different colors on each leg. Sort of like toe punching. lolI bought those this year for the first time. I hate them. They can pull them off. I have half my hens and roos that don't have them on any more. And had a HRIR girl try to pull if off and got her back toe pressed against her leg. Now her whole ankle and foot is all swollen. Don't know if she is going to make it. Terrible.
Jim