Of course, thats completely understandable and I'm glad to hear you are starting to get back on your feet again.
Thanks for the updates
boy oh boy that Teddy is a stubborn one. Honestly you are doing everything Perfectly though and the method that you are using is exactly what I would have told you to do. It seems to be working just as it should with everyone else too, it's just Teddy who is the difficult one.
With Bunny - try hand feeding her the itty bitty pieces since she seems to freak out a little bit when she hits one. Even if you stick a couple in some fish oil and keep popping them in her mouth until she starts taking them without as much of a hesitation.
Now for mr. Stubborn teddy, I am very glad you put the kibble back. A 4 oz decrease definitely isn't what we want to see. Especially with winter beginning to approach, you should be seeing some weight increases, not decreases.
Now I am going to suggest a different approach with Teddy. You mentioned he likes Turkey baby food? Do you have any on hand?
Approach #1: Try mixing a little bit with some of his soup and see if that helps at all with the taste for him.
Approach #2: take some of his kibble and crush it up. Take the little slivers of chicken and coat them in the dust. Try popping a few in his mouth and see what happens.
Approach #3: take said kibble crumbs and also sprinkle them on top of his soup.
Give all three of those a try and let me know if any seem to work. I've got a few more ideas so let me know as soon as you can so that I can give you the others if they don't.
Now for the runny poop... Could you post a picture?
I need to know if its just runny because he is eating the kibble and raw or if perhaps he has a chicken intolerance, which is entirely possible.
I am also going to suggest you add more egg shell. Since you are also adding the ground turkey, there might probably isnt enough calcium.
So instead of 1/4tsp per 8oz of meat, increase it to a 1/2 tsp per 8oz meat (and include the weight of the turkey in there). I would also recommend throwing some more hearts in since you should have 1oz hearts per 8oz meat.
It's also possible that there's a bit too much liver for Teddy. We are finding that some ferrets can't tolerate 1 chicken liver / 8 oz meat. So change that proportion to 1/2 chicken liver per oz meat.
Give that all a try. You can also give Teddy a 1/4 tsp plain pumpkin for three or four days in a row until you notice the poop firming up a bit and then stop with the pumpkin.
And to answer the egg question, you don't want to give too much egg, but it is great for hair balls as well. Try aim for 1 whole egg per ferret per week. So if you are mixing in with the soup, you can add 4 eggs over a week's worth of soup and split the soup evenly between the ferrets.
For everyone else, keep going with the thickness increase.
You can definitely try smashing some bones up with a hammer too and seeing what your grinder will do with them. Just be forewarned bone can wreck the grinders.
That's awesome that you have a Cornish game hen. We can definitely add some more proteins soon, it's just a lot easier if the ferrets are eating pieces of meat (bigger than a pinkie fingernail.)
I am going to recommend pushing the ferrets (and yourself a little bit). It is going to require some hard work and persistence but you need to keep on them and not let them wuss out.
This means popping slightly larger pieces of chicken into their mouths, and scruff and stuff with teddy with the soup and pieces if need be.
One last thing with Teddy, is you may want to try separating him for a day (as log as this wont traumatized him) and leaving soup with him in the cage, it's possible he prefers to eat I. Privacy and that's why he is stopping when you stop spoon feeding.
You could also consider getting him a darker feeding box where he can eat.
And here's one last trick:
When you are spoon feeding Teddy, do it over a plate of soup and slowly and slowly lower the spoon until it is resting on the plate, and then sneaking out of there if you can so be is tricked Into eating off the plate.
Let me know how all that goes!