He is a bit apprehensive about some new stuff but has not shown any aggression.   He has not been tested with cats.   He is good with other dogs with a proper introduction and has been around a smaller dog with no problems.  He walks well on a leash and looks to his handler for guidance.   He's a larger boy and will be an awesome rottie once he's gained weight and filled out.  Cato loves to play with his metal food dish, he grabs it and throws it high in the air and then catches it in his mouth when it comes down - it's pretty funny to watch.  We will continue to evaluate Cato and update this webpage for him.