Originally Posted by bearisgray
I try to cut my thread into short lengths so that in case the birds swallow it that it won't get stuck in their guts.
I wonder if this is necessary?
Yes it is necessary, not because it may get stuck in their gut, they don't swallow it, they carry it in their beaks, but because if it's too long their feet get tangled in it, and baby cbirds especially, often lose toes and feet. Thus affecting their survival rate.