Hi, I've got a 20 month old border collie, lovely dog, very affectionate and generally well trained. However over the past few months he's taken to refusing to come back to me when he's playing off lead - he'll return to maybe 4 or 5 feet away and then just keeps bloody circling me. I've tried feigning disinterest and slowly walking off - he'll follow but stays just far enough away that I can't get hold of him.
He loves food and I use various treats but he'll ignore them - and the rattle of the treat tin which normally gets him running - if he decides he's not coming back. The last couple of times he's done it, it's been the lucky chance that a friend has come along with her dogs, he's gone up to her to say hello and she's caught him for me.
I let him off lead in nearby fields - no livestock etc - so it's a 'safe' area but it's infuriating and I can't understand why he's regressed like this. He's my constant shadow around the house so I don't think he's actually trying to lose me
Does anyone have any advice please? I'm hoping to start agility with him in the next few weeks which might help (or if he keeps this up we'll get drummed out of the class).