From my experience with rough dogs, they either learn with time... or they don't.
lol Mike.....I'm not sure if your statement says it all...... or don't say much at all. HAHA
I've seen more get worse as they get older than I have seen learn. Most of the time a grown dog has allready took some lessons and decided to keep doing what they do anyway. Sometimes you can hunt a dog like that by its self and they will not be as rough.
Waylon