i would pop a note through the door saying..
hi iv moved in recently iv just noticed you too have a rabbit! they are great companions i love mine dearly its always nice to meet other owners who share your passion, i did notice its hutch was fairly small prehaps it could be extended? its fantastic the binkys and funny things they do when they have more space and toys! mine also loves having a companion(but you have to get neutered first(but im sure you would prob be doing this anyway for behavioural and medical reasons they dont live long without the op sadly do they
)!i would happily reccomend you a rescue to get a freind from?) its a worry how pet shops keep selling these small hutches when rspca now reccomends a 6x2x2ft hutch attatched to a 6x6ft run i thought id best tell you as iv heard of people getting prosecuted for neglect due to hutch size! iv seen your boys playing with bun so i know they must love and care for it, id happily show them my bun and how to get the best from their own in terms of freindliness etc, do let me know if i can be of any help, iv also got some brillinat care sheets that i got given when i first started keeping a bunster... i mean we are all learning i wish i knew al li know now then!!!! if you want them i can drop them round? give me a bell anytime , kind regards... . number ____ telephone 07..........
EDIT: jsut read that you went over.. how about sending a plan with a note saying.. iv been thinking we could easily and cheaply extend the hutch and make a run like this?! or how about freecycle? tscos are doing green tunnels for £3 bet bun would lvoe that! i apprichiate you thought i was poking my nose in not meaning to jsut wanted you to be able to se ethe awsome binkys happy bunnys in space do its quite a feat to see!!! was also thinkign you might like some home made toys i make them for my buns all the time i cant afford the expensive ones.... i can drop some by if you like?
(note you can make toys out of lots of things such as a string threaded with veg=kaboob, a pile of hay and herbs wrapped in brown paper with string=bunny parcels, a toilet roll tube with a bit of paper still on= toss toy, a yellow pages... love to shred and tear, a cardboard box with holes in it.
or how about offering the bun to come over to yours for play time to have a run andd stretch its legs?(depends on how u feel as this bun is likely not vaccinated) x