It all comes down to ingredients,the quality of those ingredients,and how digestible those ingredients are.Chicken as a first ingredient might seem good,but you actually would need a meal based named protein source as the first ingredient(raw meat getting cooked in the kibble ultimately weighs far less than the meal form,therefore chicken really isn't the first ingredient in this case).It also would contain wheat,which is not easy for any dog to digest.Maize(aka corn)is also hard for dogs to digest.Animal fat being incredibly vague is something that should never under any circumstances be fed,same with digest.
Did you try pureed pumpkin and probiotics when he had an upset stomach with the higher quality kibble?If not,I wouldn't assume that he definitely can't eat that food.He might not have a very developed stomach and it'll take time,but between a rotational diet and a high quality probiotic and pureed pumpkin routine he will be much healthier in terms of digestive health.You could give raw green tripe as a treat as well,which in its raw form(not canned or otherwise heat processed forms)has digestive benefits.
Raw diets,if done properly,are the ideal solution for sensitive dogs!They're also the most appropriate diet for the species.
If he did well on the turkey + rice it might be that either he's sensitive to fish(or just the particular fish species used in that food)if the other ingredients are identical,or he needed probiotics and pureed pumpkin for the extra support.Keep in mind when looking at probiotics there should be no vague digest(or other unspecified biproducts such as derivatives,meat and bone meal,animal fat,animal liver,etc),no artificial flavors or colors,no unspecified preservatives(including E&C approved which can be BHA/BHT/ethoxyquin which are known to cause cancer),no artificial sweeteners or processed sugars(such as dextrose,maltodextrin,sorbitol,and fructose),no corn or wheat or derivatives of those,and no sulfur dioxide or propylene glycol.Purina's probiotic might seem to meet these requirements,but sadly the ingredients aren't completely true on Zooplus and it actually contains animal digest
I really couldn't find decent probiotics from Zooplus anyways.However,P@H do happen to have Tropiclean to an extent including a very good probiotic.
http://www.petsathome.com/shop/en/pe...opiclean%2522#
The ingredients as they aren't listed on P@H:
Canola Oil, Pollock Oil, Coconut Oil, Salmon Oil, Mixed Tocopherols (Preservative), Rosemary Extract, Natural Vanilla Flavor, Flaxseed Oil, Fructooligosaccharide, Hemicellulose Extract, Yeast Extract, Dried Enterococcus Faecium Fermentation Product, Dried Lactobacillus Casei Fermentation Product, Dried Lactobacillus Acidophilus Fermentation Product.
I know one of the ingredients might sound like a sugar,but despite having potential sweetening effects it actually does have a purpose and benefits(unlike other unnecessary ingredients you might see in other products).If you really had to you could potentially source a human grade probiotic with several probiotic strains that is equally high quality,as long as every ingredient is known and safe for dogs
