When high-producing cows were fed a sup- plement containing copper, manganese, zinc, and magnesium amino acid chelated minerals for the first 180 days of lactation for three successive lactations, by the third lactation there was a significant increase in milk pro- duction compared with equivalent cows fed the same minerals from inorganic sources. The larger volume of milk from the AAC group resulted in significant increases of milk fat and protein (by weight) and suggest- ed a possible trend favoring a greater percent- age of fat and protein in milk from cows receiving the AACs.
www.feedstuffs.com/story-chelated-minerals-help-lameness-infertilit.
Hi,
From my experience supplementation of minerals to infertil dairy cows does only make sense, if you have a proven deficiency - in German herds a rare situation.
Clinical examination should be done to find the reason for the poor BCS. If parasits (fluke e.g.) and other individual diseases can be excluded , the majority of cases you discribed occurs in consequence of subclinical ketosis during a period of time within the first 6 - 8 weeks after parturition.
With regards
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