Louis, who will be a year old next week, has been a problem at Ringcraft and at our other training class as well. At his worst he barks a lot when he's doing nothing and rolls about on the floor almost like he's having a tantrum. He's also been reactive to one or two other dogs that have said hello to him, growling and air snapping, although he seems reasonably relaxed with most of the dogs.
At his best he's really good about being stacked, both on the floor and on the table, likes people going over him, trots up and down on a loose lead and free stands at the end
But I'm never too sure which Louis is going to be with me, tantrum Louis or angelic Louis.
I find him quite a difficult dog to understand, but I've recognised that he's anxious in enclosed areas when he's on lead and when other dogs are nearby, so I've stopped going to Ringcraft and training on a regular basis and just take him along every so often. I'm not sure if that's the right thing to do, but it seems to have taken some of the pressure off him and he was more relaxed the last couple of times we went, which also meant I was more relaxed too.
I totally agree with Brimbeck that a lot of non Cocker people in showing expect too much of Cocker puppies and don't realise that some need a bit more time to get used to showing than some other breeds and that apparent naughtiness and excitability can be due to anxiety. Louis has been written off by a number of people at Ringcraft as being naughty and when I started agility with William and he was finding it hard to focus I was always being told "What do you expect, he's a Cocker" and written off before we'd got going.
I hope your perseverance pays off with Pebble. When I have a breakthrough moment with Louis it's just magical and makes up for the difficult days.