My lurcher was around 2 ish when he calmed down enough to not be a complete nucence of the lead, he was about 3 when he stopped chewing the house it gets a bit tiresome having to but new sofas & internal doors after the bugger had eaten them, oh and a cat flap & hundreds of other things he chewed or ate, how he lived beond 3 is a mystery, never had a mins bother with him after 3 yrs old
this is him with my eldest son taken about 4 yrs ago, sadly he was killed some yrs ago after a firework was let off & he gt run over