The following ration was being fed to hogs weighing 150 pounds. corn 1750 lb.; SBM (44%) 200 lb. and Base Mix 50. Feed intake was normal, but gain was 15 to 20% below normal. What was the problem?
Ans. Protein level at about 11.8% is deficient.
Hogs showed some lameness problems so the producer added 25 lb of limestone per ton to the previously fed corn-SBM-basemix ration which analyzed: protein--13.5%; calcium--0.6% and phosphorus--0.5%. Feed intake dropped, gain slowed, and the lameness problem seemed to get worse. What was the problem?
Ans. The added limestone widened the Ca : P ration from 1.2 : 1 to 2.2 : 1 (too wide). Also extra limestone unpalatable.
The producer was feeding a nutritionally adequate corn-SBM-basemix ration with 3 lbs. synthetic lysine per ton to finishing hogs. A shortage of SBM resulted in a dramatic rise in SBM price from $190. per ton to $250. The producer substituted another 3 lb. lysine and 97 lb. corn for 100 lb. of SBM per ton. Growth rate and feed efficiency decreased and the hogs appeared to be slightly fatter. What was the problem?
Ans. Replacing 200 lb. SBM with 6 lb. lysine reduced the threonine & tryptophan levels to .34% (Req.= .4) and .1% (Req. = .1) respectively.
A producer had a couple pigs that died diagnosed as a selenium deficiency. Three lb. of a selenium premix (which would contain the recommended amount of selenium) had been added to the batch vertical mixer containing the corn and supplement (which contained no added selenium). what might have been the problem?
Ans. Selenium at 3 lb., if added to vertical mixer withno premixing, probably would not have been evenly distributed.
A producer noticed when he started feeding new corn that feed intake decreased dramatically. Pigs would put their heads in the feeder, then back away and squeal. He noticed one pig vomited. What was the likely problem?
Ans. Sounds like a vomitoxin problem.
A producer using a meter mill was feeding corn that was not mature when the first hard freeze came. The next quarterly record showed an excess of SBM used per cwt. of pork produced compared to previous quarters. What probably happened?
Ans. Frosted immature corn probably resulted in low test weight. If meter mill was not recalibrated, a higher than planned proportion of SBM would have been metered into feed.
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