Annie in Washington here again today re: dog food recipes
A couple of years ago, Halo, the organic dog food company (and co-owned by Ellen DeGeneris) that makes Spot's Stew published its recipe.
 
I made a batch this morning, using left over turkey instead of chicken. I always add olive oil... The recipe is a good template for making your own variation.
 
Spot’s Chicken Stew from Halo
2 ½ pounds whole chicken 
¼ cup chopped fresh garlic 
1 cup green peas 
1 cup coarsely chopped carrots 
½ cup coarsely chopped sweet potato 
½ cup coarsely chopped zucchini 
½ cup coarsely chopped yellow squash 
½ cup coarsely chopped green beans 
½ cup coarsely chopped celery 
1 tablespoon dried rosemary 
16 cups spring water
8 ounces whole barley
6  ounces rolled oatsand adjust the water content to a total of 16 cups,  or enough to cover the ingredients.
Combine all of the  ingredients in a 10-quart stainless-steel stockpot with enough water to  cover. Bring to a boil, then turn down the heat as low as possible and  simmer for two hours – the carrots should be quite soft at the end of  the cooking time. Remove from the heat, let cool.
The original recipe called for blending ingredients into a puree. That extra work is not necessary. Freeze in empty yogurt containers, after cooling.

 
