My last girl was an only bun for the first 3 years of her life, then i decided maybe it would be best to get her a partner because only another bun could fully understand her being one themself.
I decided on a trooper, a bin with a story. A bun who needed a good forever home and one my girl would accept.
When i gave in to getting her little fella, it was tye best thing ever.
When she passed, her widow and their feline were so heartbroken as was i, but after a year i decided my fella needed a new wife because he needed that understanding partner.
My new little girl is a great blessing to my noys and all us well with my furfamily again.
My sister only ever has one bun at a time and swears by giving the bun a stuffy the same size as they are but has never mentioned using a mirror.