Good Colostrum Quality from 2nd Milking

Is  it worth your time to check second milking from mature cows for antibody concentration? YES.

Dr. Noelia Silva-del-Rio, UC Davis Veterinary Medicine Extension specialist in Tulare CA, measured first and second milking from third or greater lactation Jersey cows. She had 134 first-milking samples and 68 second-milking samples.

43% of the second-milking samples contained IgG concentrations of 50g/L  (the industry standard for acceptable quality for first feeding).  

Given a shortage of first milking colostrum, Dr. Silva-del-Rio encourages producers to collect and test 2nd milking. 

I agree. These data suggest that nearly one-half of the time the 2nd milking will be suitable for the first feeding of newborn calves. 

Reference: California Dairy Magazine, May 2018, p16.

Feeding Hay with Calf Starter Grain

The June 2018 issue of the calf management newsletter, "Feeding Hay with Calf Starter Grain," is now available at 

http://atticacows.com/library/newsletters/CEJune2018.pdf or click HERE.

The summary bullet points are:

• Achieve better outcomes feeding a mix of grain and hay compared to grain only.
• If a “little” is good, would “more” be better? No!
• Practical alternatives for including 5 percent chopped hay.
• What if no chopped hay?

Enjoy!

Why Differences in Starter Grain Consumption Among Limit-Fed Calves?

"How much starter grain should a pre-weaned dairy calf be eating?' That is title of a Washington State University Extension publication (Dr. Dale Moore, A. Adams-Progar, W.M. Sischo). They tracked starter grain intake for 90 calves on each of 3 calf ranches in Washington state.

They asked the question, "Why differences in starter grain consumption?" 

 1. Different levels of milk/milk replacer feeding. There were not wide differences among the 3 ranches in milk feeding levels - they were all limit-fed. At this level of milk feeding it took about 2 weeks for intakes to get up to 1 cup per day on all 3 ranches. So, this question was not really investigated in this research. 

My reading of other research findings suggest that when feeding rates of 4 quarts of 20/20 milk replacer (12.5%solids) daily are compared to 8 quarts of the same product daily both age at initial grain intake and subsequent level of consumption are delayed at the higher feeding rate.

At the time I was caring for 100 calves on milk I subscribed to the idea that calves need to be eating some calf starter grain for about 3 weeks before I began to cut back on their milk ration. I still think that Heinrich's work at Penn State supports this guideline. It was this concept of rumen development turning around in my head that got me started closely watching grain intakes among the calves that  should be at the "start eating grain" age. 

My own calves fed at the lowest rate (4 qts daily) averaged about 7-12 days for initial intake (1 cup per day) compared to the highest rate (8 qts = 2.2 pounds of m.r. powder daily) averaged in the range of 15-21 days for initial intake.

My most important observation from my own calves was the very wide variation among calves drinking the same volume of milk replacer for age at initial grain intake. Among the intensive-feeding program calves there were as much at 10 days or more differences on initial intake ages. Stated a different way, once I began tracking grain intakes about 20% of them turned out to be what I called "laggards" - slow to begin eating grain.

I began dumping and refreshing grain for all these young calves daily until they began to eat it. Then, when they cleaned up a generous cupful of grain several days in a row I snapped a tag to their hutch - that told us we could start the 3-week count-down for beginning the weaning process.

What's the problem with using this 3-week guideline? In my consulting practice between 2000 and 2018 I have not found many calf managers willing to spend time monitoring calf starter grain intakes. The dominant pattern is to dump a quart or more calf starter grain in a pail when the calf goes into the pen or hutch. Then, just leave it there until it disappears in the next 2 or 3 weeks. So much for grain pail management - that kind of benign neglect is non-management in my opinion,

2. Different levels of gastro-intestinal health - either scours or not scours. This is the unique finding for this research report. 

This research found significant differences among the 3 ranches in the percent of calves with diarrhea by day of age. For example, at 12 days of age one ranch had 38% of calves treated for scours while for comparison another ranch was only treating 4%.

The study authors conclude, "The percent of calves with diarrhea could explain about 42% to 51% of the variation in average daily starter grain consumption." (p4)

Rather than grain intakes continuing to climb day-by-day, it appears from the graphs shown in the publication when calves don't feel well (that is, suffer from scours) their intakes flat-line for 3 to 5 days.

This drop in grain intake is valuable information for calf management.
What would I like to see calf managers do when they spot this "flat-line" of grain intake for a calf?

1. Dump those grain pails every day, add a handful of fresh grain.
2. Spend a little extra time to watch these at-risk sick girls.

If you  have many, many calves mark or flag these "at-risk" pens or hutches. They need extra daily attention in case this gastro-intestinal upset slides into a case of treatable respiratory illness.

Reference: To access this publication click HERE or paste this URL in your web browser
http://vetextension.wsu.edu/wp-content/uploads/sites/8/2017/07/FS288E.pdf  [accessed 5/21/2018]

Bacterial Regrowth and Sanitizing

None of  us create sterile equipment when we clean up from feeding colostrum, milk and milk replacer. Some bacteria remain on these surfaces. Regrowth is inevitable even when we try to suppress it with acid rinses and allowing equipment to air dry. 

In a recent article, "How to properly sanitize calf facilities," Drs. Ollivett and Sockett (Univ. Wisc.) comment on the need to sanitize calf equipment before using it to feed calves. 

"All colostrum and milk or milk replacer feeding equipment should be properly cleaned after use and sanitized not more than two hours prior to use." p73.

We all understand the part about "properly cleaned after use" - the most efficient way to minimize biofilms on buckets and bottles is to clean them ASAP after every single use. Click HERE for a practical on-farm 4-step cleaning protocol. 

What about their recommendation,

"and sanitized not more than two hours prior to use" [emphasis added]

Let's assume that we do a good job of brushing our bottles, nipples and tube feeder in a hot detergent solution, put them through an acid rinse and put them upside down on a rack to air dry until the next use - most likely to be more than two hours later.

How urgent is the need to sanitize them before the next use? 

Colostrum feeding - I felt pretty strongly about minimizing bacteria load for colostrum. I rinsed all my bottles, nipples and tube feeder with a strong bleach solution every single time before colostrum feeding.  No exceptions. All the evidence I have seen in the past decade or so emphasizes the need to feed clean colostrum.

Milk feeding - I was fairly lax about sanitizing bottles for milk-fed calves - the bottles were washed  after every use and put on a rack to drain and dry between feedings. At feeding time my nursing bottle nipples were carried in a 10-quart bucket filled with a strong bleach solution. We only bottle-fed calves until they could be bucket trained so there were not a lot of calves fed with bottles. Looking back it would not have been difficult to sanitize the few bottles - it just did not occur to me to do it. 

Milk feeding all calves with bottles - depending on the potential for bacterial regrowth many calf operations likely could benefit from a pre-use sanitizing rinse. This would depend on (1) how effective is the washing process, (2) is there an acid rinse to lower surface pH, and (3) do the bottles air dry between uses.

Milk feeding calves with buckets - buckets not washed between feedings is common - my calf consulting observations suggest that washing and sanitizing all the buckets is not going to happen when there are 100, 500 or 5,000 calves on milk. Nevertheless, where there are serious issues with scours among 7 to 14 day old calves I have seen cases where using a clean bucket (not sanitized) for every feeding for these youngest calves has led to a significant reduction in treatable scours.

I cannot recall a well-designed study that examined the hypothesis that sanitizing buckets before each milk feeding will improve calf health, feed efficiency and rate of growth among preweaned calves as compared to non-sanitized buckets.  I would really like to see an analysis that shows the extent that sanitation of all feeding equipment for all age calves has a positive cost effective value.

Refererence: T. Ollivett and Donald Sockett, " How to properly sanitize calf facilities." Progressive Dairyman, May 7, 2018, pp 73-74. 

"Normal" time for navel cord detachment?

I have to admit that I have not paid much attention to when navel cords detach or fall off. However, an excessively short or long time for retention possibly could be a signal that something is wrong.

In a study about navel dips 67 Holstein heifer calves with unassisted births were observed (general health, umbilical infections, umbilical cord diameter) for about 22 days. 

What did they find regarding umbilical cord detachment?

Earliest detachment was between 12 and 13 days.

Latest detachment was between 20 and 22 days.

So, I am guessing we should start looking for cords to start falling off just short of two weeks and all of them to have fallen off just over three weeks of age. 

I occurs to me today that a cord missing in the range of 5 to 7 days should trigger an examination - maybe an abcess?

A cord that is still there at 4 weeks of age? On one hand I cannot recall one on a calf that old. On the other hand I guess that is possible - maybe cause to take a look at this "abnormal" situation. 

Reference: Fordyce, A. L. and Others, "The effect of novel antiseptic compounds on umbilical cord healing and incidence of infection in dairy calves." Journal of Dairy Science 101:"5444-5448

Electrolytes for dairy calves and Alkalizing Agents

In a summary Hoard's Dairyman article about calf electrolytes Geof Smith, D.V.M., recently discussed the role of alkalizing agents for raising blood pH.

He summarized the problem:
"The blood in virtually all calves with diarrhea becomes more acidic a the pH falls. This largely is responsible for the symptoms we see such as depression, loss of suckle reflect, inability to stand, and so forth."

In describing solutions to this problem he continued,
"Acetate, propionate, and bicarbonate are all considered alkalizing agents - meaning they work to raise the pH of the blood."

In his opinion, research shows considerable advantages to using acetate or propionate as alkalizing agents in calf electrolytes compared to bicarbonates.

He summarized by saying at the end of his comparison of three different agents,
"It is still critical that your oral electrolyte solution contain an alkalizing agent. ... Make sure the label of the oral electrolyte product you are using include either acetate or bicarbonate in the ingredient list."

A more general look at calf illness in this resource:
"What hits calves when ... Here's a look at the bacteria and viruses that affect our calves" by Robert Moeller, D.V. M.
Click Hoards Moeller or paste this URL in your browser
https://hoards.com/article-3365-what-hits-calves-when.html

Reference: Geof Smith, "Choosing the right electrolyte." Hoard's Dairyman, April 10, 2018, p219

Buy a New Brush?

Buy a new brush? This one is not worn out yet!

In a recent calf management note, "How to properly sanitize calf facilities." Drs. Ollivett and Sockett (Univ. Wisconsin) commented on bottle, nipple and bucket brushes. 

"Bottle, nipple and bucket brushes should be hung for proper drying." This sure sounds like good advice. Bacterial regrowth is minimal on dry surfaces. 

I had a hanger mounted on the wall next to my wash sink that made it easy to do this. And, these brushes were right at hand when I needed them. 

"brushes should be ... replaced monthly or quarterly, depending on the frequency of  use." (p73)

"Depending on frequency of use" - Well, I had 100 calves on milk, I washed 50-70 feeding pails a day, all the bottles and nipples used to feed the youngest calves and colostrum, tube feeders, milk replacer mixing barrels, etc. I felt that my brushes got a lot of use every day. 

Nevertheless, I cannot recall  having a schedule to replace brushes. I must have replaced my brushes when they began to show signs of wear - maybe 2 or 3 times a year? 

We had a tendency of other dairy farm workers to stop by the calf barn to help themselves to my brushes when they needed one. Because of this I recall replacing "missing" brushes more often than getting new ones because the older ones were worn out.

However, as calf consultant I have seen some pretty well worn out brushes that really, really needed to be replaced. 

The main point I gleaned from Drs. Ollivett's and Sockett's note was that brushes are important.

Do you recall the second step in my washing equipment protocol? Click HERE for the whole protocol.

Use hot water. Add liquid detergent and bleach or a dry chlorinated detergent. Brush all surfaces. Scrub off remaining milk residue.  Keep water above 120° (49C) at all times.

Note the "Brush all surfaces" - scrubbing with a brush is the only way to get equipment clean when manual washing. 

Refererence: T. Ollivett and Donald Sockett, " How to properly sanitize calf facilities." Progressive Dairyman, May 7, 2018, pp 73-74.