Awww aren't they gorgeous! :-*
I agree with Caroline. Kicking a dog in any way is a bad idea. :-\ That method was very popular until a few decades ago among professional dog trainers and handlers. Dog training has changed so much in a good way since. Many dogs will be traumatised if treated in such a way and if you do that there's a good chance of you ending up with a difficult dog, i.e. a nervous dog frightened of people.
My dog Eddie was mistreated before he was rescued and he still is very nervous. His way of dealing with his fear is aggression like many other nervous dogs. I love him to bits like my own child but he is not a joy to walk outside with. I have to watch every move he makes. He has made some improvements but the fear is so deeply ingrained that after over 3 years he still doesn't trust strangers. I don't think he ever will.
Aversion training creates more negative than positive. Try positive training like clicker training. I can recommend a book called 'Clicker Training For Dogs' by Karen Pryor. The book is widely available. The author has a website too, if you want to know what clicker training is like.
http://www.clickertraining.com/Basically you don't give your dog attention when he is doing something bad, like jumping at you. Cliker is used to mark dogs' good behaviour and acts as a praise. The good thing about clicker is it's easy for dogs to understand. Dogs don't necessarily understand what people say to them.
I used a clicker for training Eddie and it's done wonders. To stop him jumping up, I turned my back and ignored him when he was jumping at me and as soon as he stopped (his paws touched the floor) I clicked and gave him treats. Took only about 2 days to solve the problem and he hasn't jumped up since. He seems to have forgotten how to jump up. 8)
I think Simba is confused. He probably doesn't understand what you want him to do. He sounds like an intelligent dog, he just needs clear guidance.
Sorry for going on and on. ::) Good luck!
Tora :)
