Update! Jaffa just loves his chicken wings
I give them to him whole and he generally leaves a small piece of bone about an inch long from the biggest piece of the wing, but everything else gets gobbled up
Had a bit of a break through with Mosi tonight. He won't entertain the idea of wings yet, but I gave him some chunks of raw chicken and he was eating quite large pieces (about 1.5 ins x 1 ins) which is massive compared to the size he used to eat. He does have a small jaw and used to refuse to eat anything that was bigger than about half an inch square. But I gave him some bigger pieces tonight and he was happy to rip them apart with his teeth! It just goes to show that it's worth persisting with something
I still hope to get him eating bones eventually, but if not I'll be happy if he will eat pieces of meat big enough to require chewing.