If your butcher is ADDING to the cost of lamb for giving you bones in the meat, that's outrageous! Any joint with bones in should cost less per lb or per kg than the equivalent cut "bone free".
Penel's piccie of the her friend's breast of lamb reminded me - ask the butcher to cut the big bones at the top, as you can see in that picture. I didn't and spent an age with a bread knife (only thing that would work!) sawing through the breast bone. You're basically buying one side of the rib cage with a breast of lamb.
Also - on making the switch, I just did it - no ill effects and saved faffing about. Paddy had been on three meals a day, despite being 9 months old, because the vet thought smaller, more regular meals might help with his colitis, but I also just cut out lunch time meal at the same time. Pads was a bit confused on day one - "where's my nosh, lady?

?" - but adapted within two days to two meals a day. Books do say feed one meal (Kymythy Schultze recommends evening feeding to give them the night to digest it without strenuous exercise). I feel mean doing that to Pads and he's happy on two meals per day.
Only other thing I'd raise from the recent posts - the Tom Wolfe and Kymythy Schultze books both advise caution when feeding raw pork. I can't remember why - I haven't tried it and decided I don't need to. What do the experienced BARF'ers think about pork.
Back to my recreational bones question - what can I buy that would be suitable for Pads to gnaw on for fun? Which animal, which joint? Any advice on asking butcher to cut it a certain way?
Denise