Hi there. I'm new to this and looking for some advice on training my first gwp. He's a dog pup 8 months old and I'm starting to worry that I'm falling behind on training. He's walking nice on the lead and sitting on command but as soon as the lead is off his neck I can't do a thing with him, he just wants to mess around and play. I have herd that they are slower to mature than other gun dog breeds. I just want to be able to get him to come back to the recall, walk to heel and retrieve. Any advice would be much appreciated.