Calfology Blog

New study on Cryptosporidium of little help in U.S.

In the latest issue of the Journal of Parasitology there is a short article reporting on a small trial comparing the effectiveness of azithromycin, co-trimoxazole, and kalvangi as control agents against Cryptosporidium

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New study on Cryptosporidium of little help in U.S.

In the latest issue of the Journal of Parasitology there is a short article reporting on a small trial comparing the effectiveness of azithromycin, co-trimoxazole, and kalvangi as control agents against Cryptosporidium

Read More »

Why Do Scouring Calves Get So Sick? – Part 3. What happens to the calf during a scours event

Let us quickly review what we covered in the first two parts of this series. First, there are four main factors in calf scours: dehydration, acidosis, D-lactic acid overload, and endotoxemia. Of these, D-lactic acid overload is the most harmful to the calf.  In a few cases, hypoglycemia or thiamine deficiency may be responsible for abnormal calf behavior.

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Why Do Scouring Calves Get So Sick? – Part 2. Continuing introduction to scours, and related abnormal conditions

In the first installment of this series, we discussed four important factors in calf scours: dehydration, acidosis, D-lactic acidosis, and toxemia.

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Why do scouring calves get so sick?

Why Do Scouring Calves Get So Sick? – Part 1. Introduction to calf scours.

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The incredibly thin line between sickness and health in calves

The incredibly thin line between sickness and health in your calves

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Colostrum, refrigerators, and hot weather

In the current issue of the Journal of Dairy Science, my fellow blogger Kim Morrill published a paper reporting the results of a large survey of colostrum quality, using data taken from 67 farms in 12 states, in 2010 [Nationwide evaluation of quality and composition of colostrum on dairy farms in the United States, K.M.

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Another take on group housing of pre-weaned calves

In the current (June) issue of the Journal of Dairy Science, scientists in the Animal Welfare Program at the University of British Columbia offer another way to improve feed intake in calves, both pre-weaned, and immediately post-weaning.

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A tale of many failures . . . and a few successes

Kim’s post about a calf grower with a new barn that did not work out so well reminds me of a lesson I learned “the hard way”. 

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Did those milk samples really tell you anything?

Let’s take a closer look at the common recommendation: “you should get some milk samples checked to be sure there is no problem with your milk feeding program”. This usually comes about because there have been some sick calves, and the question that is asked is: is “something” (a pathogen) getting in the milk?

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