Firstly, make sure they are spayed / neutered and 6-8 has passed.
Secondly, make sure you have at least 1 week you can spend with them, dedicated to them.
Then...
100% neutral territory, for 2 buns a space of approximately 4ft x 2ft.
Place buns in said space with NOTHING but hay in.
Humping, nipping, chasing is all normal behaviour. So is ignoring, grooming.
Fighting should be seperated (have some gloves ready, you do NOT want to get in the middle of two buns fighting). Seperate for a count of 10, place attacker bun back in. If ocntinues, seperate and seek furhter advice.
Dont extend the space until they have not fought for ~48-72hrs.
Basics.
Janice hopefully will come along soon along with the other bonders and offer further advice. If you would rather, you can donate to a rescue to bond for you :wave: