How old till they start fighting for alpha title??

I think my boys are trying to take away BooBoo's alpha male title! He's feeling better now so I dont know why they would wait til now, because they're getting their butts whooped! Will they learn that he's the big boy on campus? They sleep with him every night, and Jax even nurses on BooBoo so Im not even sure thats what they're trying to do! They seem to be ganging up on the poor fella, but he can handle himself very well! Im more worried for them to tell you the truth! he doesn't have front claws but when you see them run at him and him growl and give them a good THUMP its scary! You can hear one of his thumps across the room! They're all gonna have headaches if they dont knock it off! Could it be lack of exercise for the little ones?? (they're 6 months old now and BooBoo is 7 years old) So if anyone knows whats going on let me know! BooBoo normally doesn't growl so Im thinking its not play!

It's normal. BooBoo's growl is just a reminder of who is the boss. If there is a dominant one among the youngsters, he will not stop but he will take his time.

Oh I hope he takes a good lot of time... at this point BooBoo's not ready to give up the throne yet! Its weird, they're all lovey dovey one minute, and the next my youngsters are trying to kill him!!

Charlie was probably 8-10 months old when he really started to assert himself to be top cat over Ling.

My kittens Eek and Jax are a little over 6 months, Jax is a big boy, but he hasn't been as agressive as Eek has! Eek has been pummleing poor BooBoo and BooBoo just isn't going to take it! Eek is 5lbs right now and BooBoo is 14lbs! So when BooBoo defends himself he really defends himself, and I just dont think Eek knows what he's getting himself into! He is a small cat at best, and doesn't have the strength the other two do, so its weird! But come night night time they stop growling and fighting and cuddle up and go to bed! BooBoo is so forgiving! I wouldn't be so forgiving, and in fact it makes me mad that all this is going on, but I dont want to stop it if its normal with a group of 3 male kitties! I know that BooBoo will try not to hurt Eek, but the babies have been relentless! I figure it will stop if BooBoo gives him one good bite, but thats not his way! He's very gentle, and took on the fatherly role when I brought them in so I dont think he wants to fight for dominance, I just think he thinks he has too! At night time I try to make them know who's boss, BooBoo comes and gets his lovens first and when he leaves or falls asleep then the other 2 will come up to the top of the bed (they lay at the foot while he's getting petted) and get their lovings! I think BooBoo has earned his title, but I dont know if I should play with nature or not! BooBoo's ALWAYS been alpha male!

Should I just ignore the situation??