George Dunham from The Ticket in Dallas is discussing this and had posted this same pic on Twitter. He's convinced this is a mountain lion. Just looks like a large bobcat to me.
It is a bobcat. The homeowners never questioned it, anyone with eyes can see it. George lives about 1 mile from where the photo was taken, and he knows the homeowners, but it isn't the first time that he has taken a local item of interest and used it to stir up conflict on his radio show. Isn't he supposed to stick to sports?
Nope. Used to listen occasionally until he turned his show into an anti-drilling soapbox during the Barnett boom, and shamed a number of very good people around here.