a chicken back for Topaz, 2 for Truffle the pitbull
3 large "doggie meatballs" for Bhindi, plus a slice of fresh beef liver she didn't touch
1 large meatball for Granny.
(Doggie meatballs make ground beef into a complete food- I premade them and froze them in a large container.
ground eggshell (ground in food processor as small as possible, until a fine dust)
Form into balls
The egg helps the mixture stick together, and the eggshell gives the meat the calcium & phosphorus it needs to give complete nutrition.
Ground organ meat in a small amount could be added to the meatball mixture to make it even more complete.