Yes, I was wondering if a small bit of quail would be allowed as they are quite similar, however I had success re offering the crushed meat and bone at lunch mixed in with half a teaspoon of probiotic yogurt, He's a big dairy fan so I was worried he'd lick the yogurt off but he ate the lot in the end, took 45 mins of chewing, spitting out and coaxing to get through one crushed up chicken wing tip but he did it and ingested plenty of bone in the process so I am very happy!
The mini supermarket next to us has two quail for €4.50 which seems very good value. They also had more cuts and organs of rabbit that you can imagine, lots of a particular organ of veal (think it was liver or kidney) along with the usual lamb, duck, chicken, turkey, pork etc which has all made me feel that a good variety will be easily achievable and affordable for him once he is adjusted

Can't wait till I can go rummage in the butchers, there are always tons of frankly gross looking things in their windows! haha