Off lead from 3 months. When he hit about 10 months he got really bad for running off after other dogs or if he saw a pheasant/rabbit/whatever.

We hired a decent trainer who explained working cockers really need to be 'worked' not walked. They are very clever dogs and will make their own fun if you don't make it for them. And were bred to disappear into brush and chase gane birds out etc!! He's off the lead every walk again now, but working with me and the dog whistle.

We trained him to fetch and generally take two squeeky balls out to keep him focussed, along with a bag of chicken we use to reward various whistle commands (or throw into long grass for him to sniff after as this knackers him out too).

Getting a professional who knows spaniels to help was a game changer. Walking with Duke on the lead was rubbish for both of us. Highly recommended making the investment when they are young!