這篇和Donald R. Strombeck, DVM, PhD書中建議量略有不同
RER的算法：（2∼45公斤）
每日卡洛里RER仟卡基數＝（犬體重×30）＋70
|
活動量 |
每日能量需求係數 |
|
仔犬—斷奶到4個月齡 |
3.0 |
|
仔犬—4個月齡到成犬 |
2.0 |
|
減肥期 |
1.0 |
|
已結紮成犬一般活動量 |
1.6 |
|
未結紮成犬一般活動量 |
1.8 |
|
哺乳期母狗 |
4∼8 |
以12公斤的3歲結紮公的柯基為例：（就Bonny啦）
每日卡洛里RER仟卡基數=（12×30）＋70＝430 kcal/day
每日能量需求=係數x基數=1.6×430 kcal/day＝688 kcal/day（約700大卡）
若食用每公斤代謝能量3365仟卡的飼料
每日食用飼料重量＝688/3365＝0.204公斤＝204公克，若一日兩餐，每餐102克
算法二：
2～7歲成犬-體重的0.75次方 X 125
兩歲以下-約多10％～20％
七歲以上-約減少20％
|
體重 |
熱量 |
|
5 lbs |
231 kcal |
|
10 lbs |
389 kcal |
|
15 lbs |
526 kcal |
|
20 lbs |
653 kcal |
|
25 lbs |
772 kcal |
|
30 lbs |
886 kcal |
|
35 lbs |
994 kcal |
|
40 lbs |
1099 kcal |
|
45 lbs |
1200 kcal |
|
50 lbs |
1299 kcal |
|
55 lbs |
1395 kcal |
|
60 lbs |
1489 kcal |
*1 lb.=0.4536kg
依計算結果餵食，每日觀察狗兒排便情況
如果排便成型：每週測量體重，體重若增加：餵食量減少10%；體重若減少，餵食量增加10%。
如果排便不成型：減量觀察
狗食營養比例表，參考這裡
TABLE 1 -- AAFCO Dog Food Nutrient Profilesa
| Nutrient | Units DM Basis | Growth and Reproduction Minimum | Adult Maintenance Minimum | Maximum |
|---|---|---|---|---|
| Protein | % | 22.0 | 18.0 | |
| Arginine | % | 0.62 | 0.51 | |
| Histidine | % | 0.22 | 0.18 | |
| Isoleucine | % | 0.45 | 0.37 | |
| Leucine | % | 0.72 | 0.59 | |
| Lysine | % | 0.77 | 0.63 | |
| Methionine-cystine | % | 0.53 | 0.43 | |
| Phenylalanine-tyrosine | % | 0.89 | 0.73 | |
| Threonine | % | 0.58 | 0.48 | |
| Tryptophan | % | 0.20 | 0.16 | |
| Valine | % | 0.48 | 0.39 | |
| Fatb | % | 8.0 | 5.0 | |
| Linoleic acid | % | 1.0 | 1.0 | |
| Minerals | ||||
| Calcium | % | 1.0 | 0.6 | 2.5 |
| Phosphorus | % | 0.8 | 0.5 | 1.6 |
| Ca:P ratio | 1:1 | 1:1 | 2:1 | |
| Potassium | % | 0.6 | 0.6 | |
| Sodium | % | 0.3 | 0.06 | |
| Chloride | % | 0.45 | 0.09 | |
| Magnesium | % | 0.04 | 0.04 | 0.3 |
| Ironc | mg/kg | 80.0 | 80.0 | 3000.0 |
| Copperd | mg/kg | 7.3 | 7.3 | 250.0 |
| Manganese | mg/kg | 5.0 | 5.0 | |
| Zinc | mg/kg | 120.0 | 120.0 | 1000.0 |
| Iodine | mg/kg | 1.5 | 1.5 | 50.0 |
| Selenium | mg/kg | 0.11 | 0.11 | 2.0 |
| Vitamins | ||||
| Vitamin A | IU/kg | 5000.0 | 5000.0 | 250000.0 |
| Vitamin D | IU/kg | 500.0 | 500.0 | 5000.0 |
| Vitamin E | IU/kg | 50.0 | 50.0 | 1000.0 |
| Thiaminee | mg/kg | 1.0 | 1.0 | |
| Riboflavin | mg/kg | 2.2 | 2.2 | |
| Pantothenic acid | mg/kg | 10.0 | 10.0 | |
| Niacin | mg/kg | 11.4 | 11.4 | |
| Pyridoxine | mg/kg | 1.0 | 1.0 | |
| Folic Acid | mg/kg | 0.18 | 0.18 | |
| Vitamin B12 | mg/kg | 0.022 | 0.022 | |
| Choline | mg/kg | 1200.0 | 1200.0 | |
a Presumes an energy density of 3.5 kcal ME/g DM, based on the "modified Atwater" values of 3.5, 8.5, and 3.5 kcal/g for protein, fat, and carbohydrate (nitrogen-free extract, NFE), respectively. Rations greater than 4.0 kcal/g should be corrected for energy density; rations less than 3.5 kcal/g should not be corrected for energy.
b Although a true requirement for fat per se has not been established, the minimum level was based on recognition of fat as a source of essential fatty acids, as a carrier of fat-soluble vitamins, to enhance palatability, and to supply an adequate caloric density.
c Because of very poor bioavailability, iron from carbonate or oxide sources that are added to the diet should not be considered as components in meeting the minimum nutrient level.
d Because of very poor bioavailability, copper from oxide sources that are added to the diet should not be considered as components in meeting the minimum nutrient level.
e Because processing may destroy up to 90 percent of the thiamine in the diet, allowance in formulation should be made to ensure the minimum nutrient level is met after processing.
======2014.01.15 更新=====
中大型犬肉類：蔬菜：穀類=1：1：1
蛋白質 1.67g/kg（每公斤）
（15公斤的成犬為25g）
油脂 0.92~5.5g/kg
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