Show fish oil as corrective for all dairy cattle there Is a possibility that dairymen will soon be feeding fish oils as generally as do the be poultry men the int ter feed cod liver oil to avoid rickets in growing stock to hold the health of at the laying flock and to improve hatch it ft ts IS now being demonstrated that fish oil that Is rich in vitamin D will result in healthier calves will increase tile the useful life of the cow and Is in a measure at least a safeguard against breeding troubles there Is still an excess of cod liver oil over ever what Is used for human consumption and for poultry investigations in the lie united states prove the pilchard oil gallons of which tire are produced annually from california sardines Is 3 as rich in P D as cod liver oil all tuna oil less abundant la Is equally rich salmon oil Is half as rich the use of these oils in dairy rations should receive more attention from the research men on our experimental farms and in our colleges |