Table 1.

Analyzed chemical composition of the experimental diets

Item	Fit & Trim1	Original2
Dry matter, %	89.3	90.0
	Dry matter basis
Organic matter, %	90.4	91.0
Ash, %	9.6	9.0
Crude protein, %	45.5	43.7
Acid-hydrolyzed fat, %	16.3	20.8
Total dietary fiber, %	15.7	14.6
Insoluble fiber, %	12.5	11.9
Soluble fiber, %	3.3	2.7
Nitrogen-free extract3, %	12.8	11.9
Gross energy, kcal/g4, %	5.29	5.59
Metabolizable energy (ME)NRC5, kcal/g	4.64	4.94
MEMA6, kcal/g	3.43	3.71
Crude protein intake (g)/caloric intake (Mcal)NRC	98.1	88.5
Crude protein intake (g)/calorie intake (Mcal)MA	132.7	117.8
Acid-hydrolyzed fat intake (g)/caloric intake (Mcal)NRC	35.1	42.1
Total dietary fiber intake (g)/caloric intake (Mcal)NRC	33.8	29.6
Insoluble fiber intake (g)/caloric intake (Mcal)NRC	26.9	24.1
Soluble fiber intake (g)/caloric intake (Mcal)NRC	7.1	5.5

¹Fit & Trim diet (Orijen Fit & Trim; Champion Petfoods LP, Edmonton, Canada): Fresh chicken meat, fresh cage-free eggs, fresh whole herring, fresh turkey meat, fresh chicken liver, fresh whole flounder, fresh whole mackerel, fresh whole Pacific hake, fresh turkey liver, fresh chicken heart, chicken (dehydrated), turkey (dehydrated), whole mackerel (dehydrated), whole sardine (dehydrated), whole herring (dehydrated), Alaskan pollock (dehydrated), lentil fiber, whole red lentils, whole green lentils, fresh whole green peas, fresh whole chickpeas, fresh whole yellow peas, whole pinto beans, whole navy beans, chicken cartilage (dehydrated), fresh turkey heart, apple fiber, dried algae (source of DHA and EPA), pumpkin (dehydrated), butternut squash (dehydrated), carrots (dehydrated), chicken liver (freeze-dried), turkey liver (freeze-dried), fresh whole pumpkin, fresh whole butternut squash, fresh whole zucchini, fresh whole parsnips, fresh carrots, fresh whole Red Delicious apples, fresh whole Bartlett pears, fresh kale, fresh spinach, fresh beet greens, fresh turnip greens, brown kelp, whole cranberries, whole blueberries, whole Saskatoon berries, chicory root, turmeric root, milk thistle, burdock root, lavender, marshmallow root, rosehips.

²Original diet (Orijen Original): Fresh chicken meat, fresh turkey meat, fresh cage-free eggs, fresh chicken liver, fresh whole herring, fresh whole flounder, fresh turkey liver, fresh chicken necks, fresh chicken heart, fresh turkey heart, chicken (dehydrated), turkey (dehydrated), whole mackerel (dehydrated), whole sardine (dehydrated), whole herring (dehydrated), whole red lentils, whole green lentils, whole green peas, lentil fiber, whole chickpeas, whole yellow peas, whole pinto beans, whole navy beans, herring oil, chicken fat, chicken cartilage, chicken liver (freeze-dried), turkey liver (freeze-dried), fresh whole pumpkin, fresh whole butternut squash, fresh whole zucchini, fresh whole parsnips, fresh carrots, fresh whole Red Delicious apples, fresh whole Bartlett pears, fresh kale, fresh spinach, fresh beet greens, fresh turnip greens, brown kelp, whole cranberries, whole blueberries, whole Saskatoon berries, chicory root, turmeric root, milk thistle, burdock root, lavender, marshmallow root, rosehips.

³Nitrogen-free extract = 100 − (ash + crude protein + acid-hydrolyzed fat + total dietary fiber).

⁴Measured by bomb calorimetry.

⁵ $\mathrm{M}{\mathrm{E}}_{\mathrm{N}\mathrm{R}\mathrm{C}}\left\{\frac{\mathrm{k}\mathrm{c}\mathrm{a}\mathrm{l}}{100\mathrm{g}}\right\}=\mathrm{g}\mathrm{r}\mathrm{o}\mathrm{s}\mathrm{s}\mathrm{e}\mathrm{n}\mathrm{e}\mathrm{r}\mathrm{g}\mathrm{y}\left\{\frac{\mathrm{k}\mathrm{c}\mathrm{a}\mathrm{l}}{100\mathrm{g}}\right\}x\left(\frac{96.6-\left[0.95\mathrm{x}\mathrm{t}\mathrm{o}\mathrm{t}\mathrm{a}\mathrm{l}\mathrm{d}\mathrm{i}\mathrm{e}\mathrm{t}\mathrm{a}\mathrm{r}\mathrm{y}\mathrm{f}\mathrm{i}\mathrm{b}\mathrm{e}\mathrm{r}\left\{\mathrm{\%}\right\}\right]}{100}\right)-\left(1.04x\mathrm{c}\mathrm{r}\mathrm{u}\mathrm{d}\mathrm{e}\mathrm{p}\mathrm{r}\mathrm{o}\mathrm{t}\mathrm{e}\mathrm{i}\mathrm{n}\left\{\mathrm{\%}\right\}\right)$

⁶ME_MA (kcal/g) = (3.5 × crude protein) + (8.5 × crude fat) + (3.5 × nitrogen-free extract).