Sergio is a nice boy who loves to walk. He's quite good on the leash on his own, but when he's with his buddy Patricio, he gets very excited and pulls a lot. He loves to play, both with his best friend Patricio, and with other dogs. He can be a little timid around new dogs at first. He is used to being around cats too. He is smart and independent, and can be a little cuddly too.