Having the 2 dogs I'm sure is a huge help and having them watch over your chickens all night is a huge help! The bird with the big wing span was probably a turkey vulture. I know we have them here and you do too, in Alabama.
Good luck! Nice "chatting" with you!
Guppy
RichBrad,
Just a few questions to help understand your set up. Are you home when they're free ranging or are they by themselves? Do you lock them all in a secure coop at night? Is your place in a populated area, more rural or in the middle of the woods type setting?
I think your guess...