today my rabbit domino and my nairbours 2 rabbits all unfixed where running around the garden the thing is domino and the other male rabbit totally ignored the female rabbits and took it in turns to hump each other is this normal?

Yes, this is normal.  It is most likely due to dominance humping.  Rabbits will do this to establish who is the alpha male or female.  It makes no difference what sex they are. But there is a hierarchy within males, within females and within males and females together.  Even spayed and neutered bunnies will do this to each other to establish a hierarchy.

Hi! I know the female is still young, but I would advise the owner to start bein careful allowing her bunny around non fixed boys - I think when I was doing the research I saw that the unspayed females can get pregnant as young as 3 months, and of course getting pregnant at such a young age is very dangerous for them, so make sure she stops letting her girl run around with non fixed boys!