Marshall Select Chicken Formula Premium Diet vs. ZiwiPeak Chicken with Whole Mackerel Recipe
 
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Marshall has a better protein to fat ratio. ZiwiPeak's ratio of 1.36 to 1 is too low (too fatty). (The ideal ratio is 2 to 1.) Marshall has slightly fewer ingredients, which is usually a good thing. ZiwiPeak has a slightly lower concentration of fruits, veggies, grains, and starches. Marshall is 100% pea-free; ZiwiPeak has peas as its 7th ingredient. Marshall contains controversial ingredients.
Marshall Select Chicken Formula Premium Diet
                                                             Marshall has a better protein to fat ratio. ZiwiPeak's ratio of 1.36 to 1 is too low (too fatty). (The ideal ratio is 2 to 1.)
                                                                                 Marshall has slightly fewer ingredients, which is usually a good thing.
                                                                                 Marshall is 100% pea-free; ZiwiPeak has peas as its 7th ingredient.
                                                
First 10 ingredients:
chicken chicken by-products chicken by-product meal corn meal dried beet pulp brewers dried yeast choline chloride dl-methionine l-lysine sodium propionate
ZiwiPeak Chicken with Whole Mackerel Recipe
                                                                                                                                                                         ZiwiPeak has a slightly lower concentration of fruits, veggies, grains, and starches.
                                                                                 Marshall contains controversial ingredients.
                                                
First 10 ingredients:
chicken chicken liver chicken necks whole mackerel chicken bone dried egg white dried yellow peas dried green lentils chicken fat dried quinoa
| Marshall Select Chicken Formula Premium DietKibble | ZiwiPeak Chicken with Whole Mackerel RecipeSteam & Dried Raw | |
| 
        Score C | 
        Score F | |
| Food Type | Kibble | Steam & Dried Raw | 
| Meat % | Unknown | 90% | 
| Protein % | 36% | 38% | 
| Fat % | 18% | 28% | 
| Fiber % | 4% | 4% | 
| Protein to Fat Ratio | 2 to 1 | 1.36 to 1 | 
| Total Ingredients | 14 | 15 | 
| Meat Content | 3 total high quality | 8 total high concentration, high quality | 
| Non-Meats | 2 total low concentration | 4 total low concentration | 
| Pea-free | Yes | No, 7th Ingredient | 
| Sugar-free | Yes | Yes | 
| Controversial ingredient-free | No | Yes | 
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