Hi Tiffany,
That’s great that you’re willing to cook for your dogs! A couple of great books to take a look at would be Karen Becker’s, Real Food for Healthy Dogs and Cats. You could also take a look at Steve Brown’s, Unlocking the Canine Ancestral Diet.
But, I agree…, you do have to know where to start.
I looked at the ingredients in the TOTW High Prairie Puppy formula you mentioned. There are a few things in that other than the proteins (bison, venison, fish) that could be the problem, such as tomato pomace or flaxseed. If you’re wanting to use kibble as a base, I’d start with a simple food that has one animal protein source and one starch. I might also try a food that doesn’t use chickpeas and lentils as binders since it appears as though your guy might have a sensitive digestive system and those are known to cause some gastric distress. Maybe try a limited ingredient food, such as Nature’s Variety Instinct LID. I’d recommend any of the formulas other than the lamb. You might also like The Honest Kitchen Zeal (assuming that he can eat fish). If you aren’t already familiar with THK, it’s a human-grade dehydrated food that you rehydrate with water.
I would start right now of keeping a list of everything that he eats, his reaction to it, etc. I did that and kept detailed notes and it was the way I discovered my dog’s food intolerances. Keep in mind the ingredients in any treats that he eats as well.
You could also try adding some plain canned pumpkin to his food to help firm up the stools to see if that helps. I’ve been using a product called Firm Up as needed which is dehydrated pumpkin and apple. It works great and I have much less waste because I never used a full can of pumpkin before it went to waste. http://www.amazon.com/s/ref=bl_sr_pet-supplies?ie=UTF8&field-brandtextbin=Diggin%27+Your+Dog&node=2619533011
