A comparison of feeding reconstituted and dried milk upon the growth and carcass composition of calves.

I. The live-weight gain, carcass weight, edible carcass composition, efficiency of food conversion, and roughage intake were measured in three groups of calves fed for 87 d. After a 3-week feeding period on a common regimen, one gronp of calves was weaned on to a diet of dry whole-milk powder and chopped lucerne, the second group received a similar diet except that the wholc-milk powder was reconstituted to a liquid milk, containing 12-15 dry matter. The third group was given the diet in the same manner as the second grocp except that the chopped lucerne was available ad lib. 2. The mean livc-weight gains for the three groups were 37.7, 47.6 and 52.7 kg respectively, the differences between the dry-fed and the liquid-fed groups being highly significant. 3. Energy and nitrogen accretion in the edible carcass and efficiency of food conversion were superior in the second and third groups. 4. The third group ate larger quantities of roughage, though the difference did not reach significance. 5. The reasons for the superiority of the liquid milk diet are discussed in relation to the avoidance of ruminal fermentation of the milk.