Well, I can sure tell you read all the threads bc you're already well on your way! How great to hear how much Bella loved it, that's exciting. I use the medallions as well. I've heard beef can be tough for them at first, so you may want to avoid that. If they're not allergic to chicken (and it appears they're not

), you could get those. I started w/ venison (Marcel hated/Wy loved), rabbit (same), and lamb (both loved). I don't know if I'll ever try to get chicken back in Marcel's diet or not, we'll see. Beef, maybe.
As for the bones, my vendor sells the NV bones as well - and they are HUGE - they look more like "wreck" bones than consumable bones. So, I'll be getting my bones from the grocery store. Lara recommended lamb chops to me to start with and they seem like a good size. I know a lot of people give the chicken bones, as you did.
Well, the experts will chime in soon - so I'll leave my newbie comments at that...