Thread: "You can't teach an old dog new tricks"

I took him out last night to the park to see where he was at for commands. He's got stay pretty good, I can walk out of sight and he won't move. When I get him to "come" after staying he was good over shorter distances but anything more than 60m or so he got distracted on a scent or something so it wouldn't work. His heeling is OK but it requires a fair bit of reminding. He likes to take his time when he sits. I kept the session short, about 30mins. I didn't use any treats, just praise, because in the past we used treats too much and he came to expect it on a command, so I won't to break that mindset. I wasn't really sure of the best way to reprimand him for not obeying my command, what's the best way? I read on that article awhile back about using a rolled up newspaper but I understand that's not what everyone thinks is best.