I have a friend who leaves her does in with her bucks for a few days but I don't. I always watch. I am also worried about damage being done - not by fighting but by too much lovin' and snugglin'. I have wooled rabbits and if one starts to give the other a hair cut...oi! >.< That can take them off the show tables for half the year! I don't have that many to spare so I'm very careful about everything.
I watch for it but if they don't go on their own, I'll either take the doe out and try a few days later (she might be in the mood then) and that works for half the reluctant does. The other half that are reluctant....I try table breeding. Stretch doe out on carpeted table, shoulders low or held down, hind end lifted, then stimulated just by light touching. That usually gets a high lift from them. I place the buck over the doe and, if he's not too much of a gentleman, he'll get the idea and do his job. After table breeding, I can usually rebreed (done 8 - 10 hours after first breeding) in the cage because the doe seems more willing.
Ah, and that is another reason I always watch to see when the mating takes place - so I can count the hours for the rebreeding. Because rabbits ovulate when bred, it is important to rebreed when the eggs are in prime position - usually 8 - 10 hours after the first breeding. I've used the 10 hour method with the best results.
And then, of course, I palpate 11 - 14 days after the first breeding. If she palpated negative, she goes right in with the buck again. Palpating increases my production because is saves me months of waiting and guessing in a full year's time.