Can anyone tell me a little bit about these lines, experience with these lines? What would be the best sport, venue, outlet for these lines? I'm thinking they can succeed in anything they try, but what would be the best thing to keep them busy and in work mode? I'm positive mine is czech lines, maybe mixed with some german working lines. He loves chasing cats, but doesn't chase rabbits, geese, or ducks. He likes the flirt pole, but not nearly as much as my other GSD. He has his nose to the ground quite often. He likes to climb on anything that he can....He was not really interested in the puzzle/interactive games. He loves playing tug and ball. Right now everything is play play play and all games.