First, I apologize for the poor blurry picture.

I'm trying to help a friend to ID this bird or chicken. Someone told him it could be a grouse. This bird wander in his back yard in the Houston (Texas) suburban. His description of the bird: small, about half the size of a large type pigeon; did not fly away when approached but it is fast.

The bird is no longer there for him to take a better photo. This is all I have. I hope you can ID the bird. Thank you!