VISCOO Cat Cage(for Kitten), 3-Tier DIY Catio Cat Enclosures, 24" x 16" x 36" Cat Playpen Indoor & Outdoor with Hammock, Detachable Metal Wire Cats Crate, Exercise Place for Squirrel, Ferret

I understand the struggle :/ You can try explaining to them that pigeons are intelligent, one alone in a small cage will go aggressive because it will be bored. It could only work if they let it out almost the whole day Cages like that are expensive but they can resell and buy a much cheaper option. Lots of people here get large dog crates or cattio like this one: This one is cheap and you can build it the way you want like legos: https://www.amazon.com/dp/B0FD394ZCG/ref=mp_s_a_1_3?crid=P331U48YP41S&dib=eyJ2IjoiMSJ9.YanriElTVLH09ny7z23JLN6v95isVM6wuVSyAlCso_bXMcyPE73EcGN15Be8yrWKZ9DZPWF_rmM95ZjGRdr1b_pegs_sP4a-X7clOc0-r77k2eYNKj_SarrSnDprz4ZPs6Rme6HSWbSkjSVTrzP_WOy0u89WxSlCsK8NFoA5Fg133yslFQbELWnOauOrNnuNK5r4XKQ5eDWYM9NI0HDJSw.XAlY8U6eXZahoMt-cIWATnnS4O8iCPqXm6ZquRBcit0&dib_tag=se&keywords=cattio+cage+modular&qid=1767033717&sprefix=cattio+cage+modular%2Caps%2C290&sr=8-3