Bunny Dates after your boy is neutered is great, but I would suggest visiting the shelter's first to see and get a feel for how the shelter or rescue works. I would visit rabbits that you like first, as then if your boy likes them, its just icing on the cake. I would make a list of each rabbit you like and feel that would work with you and your little guy, and then set up a time for the buns to meet. Also, ask the shelter if you can come back to the shelter with your guy a few times to see if the reactions are the same or just a first time thing.
With our adoptions, we get emails about what rabbit the person wants (more then normal it's a looks thing), but we ask them to fill out a form to get a feel for their home and if we don't feel that the bunny, the like the look of, we suggest other's and let them know why we feel that rabbit wouldn't work out.
For bonding pairs, we let the person meet the rabbits by themselves to see what rabbits like them and to see what rabbits they like. We ask them to bring a towel that smells like their bun(s) to see the first reaction that the adoptable rabbit has just to the smell. Then we move on to at least 2-3 bunny dates with different rabbits or a few with the same (so they get use to the idea of another bunny around). Then we may ask if they want to do a sleep over or foster the rabbit for a few days to get an idea of what it would be like living with the two and to see how the already there bunny reacts to having another rabbit in THEIR space. Then if it works, we finalize the adoption.
I would ask if a few dates with the same bunny you pick out or fostering that rabbit for a few days (try out period) to see if that is the new bun for you!
Questions to ask (or ones I would):
1.Ask about the rescue rabbit's past (did they come from a loving home that couldn't care for them or did they come from an abuse case...)- With our adoptions we send home paper work with all surrendering info (minus surrendering owner's personal info) with the rabbit.
2.Ask if it doesn't work out, can you bring the bun back
3.Ask if the rabbit has EVER bitten anyone or anything- Here we have to disclose all that but I know some shelters and rescues don't tell adopters that.
4.Ask if the rabbit has ever had any bad reactions to different foods or treats
5.Ask the volunteers about the normal day to day actions of the rabbit- are they more calm and layed back or are they all over the place
6.Ask if any of the rabbits have ever been in a bonded pair- Some pairs are adopted out to different homes and we have found that a rabbit that has had a buddy before takes quicker to other rabbits
7.Ask about any medical issues, even sore hocks, that way you know everything about the rabbit and maybe future cost of medical problems
I hope this helps! Good Luck on the adoption!