Prolactin causes mammary growth in combination with other hormones. Protaglandins causes mammary growth in combination with other hormones. Some animals lay down a fat layer under the skin. The center for temperature control in the brain activates the muscle countercurrent heat exchanges. Selective redistribution of blood flow through shunts away from skin surfaces.
Animals grow a winter hair coat.
Acetyl-COA is the main source of milk calcium in the cow. Corn can be a food source for the cow to produce glucose.