Lakola Rabbitry is my real life rabbitry of Harlequins and Rhinelanders.
My main breeds at the moment are Harlequins and Havanas. I work this game the same way I run my real life rabbitry: stay small, cull hard, and only breed the best. Once something comes along that's better, the previous goes. This has given me multiple BIS Harlequins. I pull my champions out of showing once they grand, but I'll throw them back in once in awhile to check the progress of the other rabbits.
I do keep at least a rabbit or 2 from breeds that need players showing. I'll breed an occasional litter from them, but I don't keep very many, just so I can help more breeds out. If you're interested in anything, let me know. If you have a breed that needs help, I'm willing to trade rabbits, just to get more people showing.