Yay, he's eating! It might not be the ideal diet but at least he's finally getting something in him and hopefully it will help get him back on track. And maybe like Moesha wrote, it might not be as important (what kind of food) once they are on the insulin? That would be great.
Sounds like you've got the shots down pretty good. I'm still working on my technique. lol Yesterday was a disaster but today went much better.
I hope that the insulin starts to kick in and that Calloway shows improvement soon. Please give him a squeeze for me.