Elk, no i don't give them wing tips. My cats are eating the meat ground. even if i give them hearts (supposedly the tastiest part) without grinding them; they don't eat it.
So i'm also giving them high quality dry food so that they don't ruin their teeth.
I tried buying commercial ground meat pet food and none of my cats liked it.
They prefer mom's mix (me) which is all chicken, with extra hearts and livers and egg yolks. I tried freezing the whites and well, that's another story.