(1) _Proteins_ contribute a large portion of the elements necessary for maintaining the pigeon’s health, muscular and respiratory system, and the organs essential to flying. The most important feeds in the protein class are peas and vetch. (2) _Carbohydrates_ supply energy. The portion of carbohydrates not used immediately changes to “fat” and is held in reserve by the pigeon to be drawn upon when it is being used continuously for messenger service. The most important suppliers of carbohydrates are rice, kaffir, wheat, corn, and hulled oats. (3) _Fats_ keep the pigeon warm and also build a reserve supply of energy. The feeds which furnish fats are rape, flax, and hemp seed. _f._ ANALYSIS CHART. The following chart gives a comparative analysis of the grains and seeds used for pigeon feed: _ANALYSIS CHART_ --------+------------------+--------+---+-------+--------------+---- | | | | | Carbohydrates| | | | | +-----+--------+ | | | | | |Nitrogen| Stock | | | | Crude |Crude| free | No. | Ingredient |Moisture|Ash|protein|fiber| extract| Fat --------+------------------+--------+---+-------+-----+--------+---- 9A705 |Buckwheat, | | | | | | | unofficial[2] | 12.6 |2.0| 10.0 | 8.7 | 64.5 | 2.2 | | | | | | | 9A747 |Seed, canary, 99% | | | | | | | pure, | | | | | | | unofficial[2] | 7.0 |5.5| 17.2 | 5.7 | 59.1 | 5.5 | | | | | | | 9A747.1 |Seed, flax, | | | | | | | 99% pure, | | | | | | | U. S. No. 1[1] | 9.2 |4.3| 22.6 | 7.0 | 23.2 |33.7 | | | | | | | 9A876.1 |Corn, American, | | | | | | | small grain, | | | | | | | U. S.No. 1[1] | 12.9 |1.3| 9.3 | 1.9 | 70.3 | 4.3 | | | | | | | 9A1360 |Seed, hemp, | | | | | | | sterilized, 99% | | | | | | | pure, | | | | | | | unofficial[2] | 8.0 |2.0| 10.0 |14.0 | 45.0 |21.0 | | | | | | | 9A1550 |Kaffir, U. S. | | | | | | | No. 1[1] | 9.4 |1.6| 11.1 | 2.1 | 72.6 | 3.2 | | | | | | | 9A1765 |Seed, millet, 99% | | | | | |