Hi everyone
Thank you so very much for your replies. Wil look at the dog training lead link in a moment. I hadn't thought about that but it does make sense.
Jackson, thank you, yes you are right. It is our friends and visitors we have to train because there is no point me telling Jag to sit if they are making a fuss of him while he jumps up at them. So from now on, all visitors will be given instructions prior to entering the house. I'm going to try exactly what you have said and I will make sure we are consistent. It will be a case of being stern with the visitors and making sure we do this each time someone comes around.
Jo thanks
We do have something similar to a "baby gate" in a way, and in effect, to give you an idea, people come through the front door, along the hallway and then enter what we call the "main room". That room has a wire screen door or it , and then there is a small, sliding door. So he can see visitors as they come into the home, but when they go to come into the main room, he then barges straight into them as they enter the door.
Gary, no, I don't think so (?) It's a fairly large home, 3 bedrooms, 1 main room, another back room, standard hallway, kitchen, bathrooms etc. Jag has the run of the house during the day, as well as his walks and play time so that he doesn't get bored and his mind is kept active. I also do basic training with him on every single walk. I will say as I don't know if it makes a difference (?) apart from his walks and play time, he is indoors the majority of the time. When he wants to go out to go to the toilet he lets us know and we let him out. Or if he wants to go out into the yard just to be outside, he also tells us and we let him straight out. If the cats aren't in the main back room i.e. the screen wire door is shut, then the back door is left open so he can come and go as he pleases although he chooses to stay in with us most of the time. Actually, on reflection, despite having the run of the house, he still chooses to be in the main room where we spend the majority of our time. This might be more info than you need sorry but just wanted to give the full picture in case anyone happens to pick up on something about his environment that may help.
Thanks ever so much guys, lots to think about, and lots to start to put into practice. I really appreciate the advice