I don't know, here are the comparisons and to me it looks like chicken soup is the best one for the price range. I used Nutro before and we did well off of it but we could do better!
This is the ingredient list for the Nutro Ultra~
1. Chicken Meal
2. Whole Brown Rice
3. Ground Rice
4. Lamb Meal
5. Rice Bran
6, Sunflower Oil (preserved with mixed Tocopherols; a source of Vitamin E),
7. Poultry Fat (preserved with mixed Tocopherols; a source of Vitamin E),
8. Salmon Meal
9. Flaxseed
10. Natural Flavors
11. Oatmeal
12. Sun Cured Alfalfa Meal
13. Dried Beet Pulp
14. Tomato Pomace
15. Cranberry Powder
16. Fish Oil (preserved with mixed Tocopherols; a source of Vitamin E),
17. Potassium Chloride
18. Dried Egg Product
19. L-Lysine
20. Dried Kelp Meal
21. Vitamin E Supplement
22. Zinc Sulfate
23. Choline Chloride
24. Taurine
25. Dried Bacillus licheniformis Fermentation Extract
26. Dried Bacillus subtilis Fermentation Extract
27. Zinc Proteinate
28. Ferrous Sulfate
29. Biotin
30. L-Carnitine, Ascorbic Acid (source of Vitamin C)
31. Manganese Proteinate
32. Manganous Oxide
33. Niacin
34. Garlic
35. Calcium Iodate
36. Calcium Pantothenate
37. Vitamin B12 Supplement
38. Riboflavin Supplement (source of Vitamin B2)
39. Vitamin A Supplement
40. Copper Sulfate, Thiamine Mononitrate (source of Vitamin B1), Copper Proteinate, Sodium Selenite, Vitamin D3 Supplement, Pyridoxine Hydrochloride (source of vitamin B6), Beta-Carotene, Menadione Sodium Bisulfite Complex (source of Vitamin K activity), Folic Acid.
Now here is Canidae® All Life Stages Formula™
Ingredient Name
1. Chicken Meal
2. Turkey Meal
3. Ground Brown Rice
4. Ground White Rice
5. Lamb Meal
6. Chicken Fat
7. Herring Meal
8. Flaxseed
9. Sun Cured Alfalfa Meal
10. Sunflower Oil
11. Chicken
12. Lecithin
13. Rosemary Extract
14. Sage Extract
15. Yeast Culture
16. Viable Naturally Occurring Microorganisms
17. Chicory Root Extract
18. Yucca Schidigera
I have heard with this last ingredient that it can interfer with absorption of fat soluable vitamins.
Last here is the chicken soup
1. Chicken
2. Turkey
3. Chicken Meal
4. Turkey Meal
5. Ground Brown Rice
6. Ground White Rice
7. Oatmeal/Rolled Oats
8. Potatoes
9. Pearled Barley
10. Ground Millet
11. Chicken Fat
12. Duck
13. Salmon
14. Dried Egg Product
15. Flaxseed
16. Natural Chicken Flavor
17. Carrots
18. Peas
19. Apples
20. Dried Skim Milk
21. Cranberry Powder
22. Rosemary Extract
23. Salt
24. Chicory Root Extract
25. Vitamins/Minerals