Hi again,
My Sheltie who's 14 week old is okay with me stroking him (and strangers outside). However he will go to my friend (that lives with me) for attention but as soon as he pats him, Oscar runs off danceing about. I suggested maybe holding his collar so he couldn't run away and gently stroke him. He tryed this and Oscar swing around and bit him hard (which drew blood). Why does he demand attention from him only to try and bite him? Oscar has always been a very pushy demanding puppy, so is he displaying Dominance. By demanding attention in his terms? He seems to enjoy playing "you can't catch me" a lot too. He holds his tail high in greeting my friend.  My friend is very soft natured, quite type that doesn't have a firm bone in his body. What can be done? :(

Try this, but you and your friend will have to be 100% consistent. Neither of you have to be 'firm' for this to work as you'll get precisely nowhere chastising Oscar.

Your friend should ignore him when Oscar comes over for attention then dances away. No eye contact with Oscar or anything - just blank the pup like he isn't there. If Oscar pushes it by jumping on your friend or any other behaviour like that, your friend should get up and walk away without saying anything and no eye contact.

Then get your friend to call him over, give him a treat and lots of praise when he's not fussing round him. Then your friend can try to touch Oscar as he's treating him - maybe start with a tickle on the chest as this is non threatening and build up slowly. Any aggression and your friend should get up and walk off. Not a good idea trying to restrain him by his collar as your friend now knows! A good thing may be to get your friend to feed the puppy one of his meals every day.

I'd also recommend you try the ignoring thing with him too when he's being demanding and strictly no 'can't catch me' games or you're just reinforcing his dominance as he's training you to run after him. You need to make sure any attention is given on YOUR terms.