Dry Cows Need Protein

We have made significant advances in recent years in transition nutrition. Lead Feed grain mixes with anionic inclusion especially, to minimise milk fever and ketosis. However, dry cow nutrition is still a major issue as research uncovers this period as also having major influence on problems at calving, fertility and whole of lactation performance.

In drier months with pasture lacking, crude protein requirement can be severely limiting in both the dry and springer phase. The calf experiences 70% of its growth in the last 60 to 70 days of pregnancy. Unborn calves are fed protein via the umbilical cord, not energy per se. This demand on the dam, if her diet is protein deficient, will cause her to mobilise protein from muscle tissue.

Ensuring adequate protein, especially soluble protein (rumen degradable) during dry months, can be done with grass silage. Hay generally only has around 25% soluble protein, whereas silage can be 65% soluble protein. Lupins can be another source of soluble protein, but limitations apply to amount fed.

Our new born calf’s future rests on colostrum intake. This applies not only to supplementary immunity until the calf develops its own immunity, but also a wide variety of other substances contained in colostrum. Many of these substances are proteins, like IgG. A deficiency of protein pre-calving is going to place a ceiling on the calf’s lifetime production, health and fertility; in short, her value to your farm business for many years to come.

Colostrum needs to be collected as soon as possible post-calving. Research has shown IgG concentration has decreased by 33% in 14 hours post-calving. Likewise, administration of four litres to the new born calf as soon as possible post-calving to avoid a similar deterioration in absorption capacity of IgG, and other protein compounds found in colostrum.

A growing trend both overseas and now in Australia, is pasteurization of colostrum to remove the threat of bacterial contamination. Bacterial contamination will not just feed the calf threatening bacteria, but the quality of colostrum also deteriorates in the presence of bacterial.

Colostrum also contains growth as well as immune modulating compounds including peptide hormones, growth factors, cytokines, steroid hormones and enzymes, amino acids, fatty acids energy, lactose, vitamins and minerals, all essential for a new productive life. Mineral nutrition of our dry/springer cow is also essential to provide these colostrum ingredients. We manufacture a self-feed Loose-Lick mineral preparation to aid in dry cow vitamin and mineral nutrition.

 

Calfmax and TreatScour are available from our webshop.

www.dairytechnutrition.com.au/our-products

Calf Scours

In a recent paper, Professor John Middleton, University of Missouri, stressed prompt treatment was of greater importance than cause of the scour. Calf scours in the first 30 days are caused by a variety of bacteria, viruses and parasites. The primary reason for calves becoming sick is dehydration. The agents causing the scour will be addressed by the calf’s immune system, however weak or strong that may be, the immune response will cause inflammation of the gut which in turn will cause the loss fluids and electrolytes.

The key to survival is addressing the dehydration. Hydrate and replace electrolytes with a commercial electrolyte product. Be diligent in mixing electrolytes following the manufacturer’s instructions. Too strong an electrolyte or weak solution will cause cell damage through either dehydration of cells or excessive rehydration. Both can cause cell death.

The invading bacteria, viruses or parasites are usually ingested from manure-oral contact. This can never be completely eliminated, but management of calving areas is a critical priority during calving. Calving pads, ‘springer paddocks’ both need to be as free as possible of manure and placental material to minimise potential contact with the calf’s mouth. Muddied teats from which a calf will attempt to gain immunity via colostrum can easily be nullified by pathogens on the dam’s teats. Even calves licking the dam’s flank or udder has the same potential. Abundant evidence of this pathogen risk is well documented in the research of the benefits of pasteurization of colostrum and fresh calf milk to eliminate degradation of colostrum and its passive transfer capacity.

Feeding areas of calving sites are always the high risk areas. In the case of calving pads, keeping this area clean will reduce the risk to our new born calf, but also reduce fresh cow mastitis infections. In ‘springer paddocks”, regular shifting of feeders also minimises the same two infection potentials.

 

Calfmax and TreatScour are available from our webshop.

www.dairytechnutrition.com.au/our-products

Managing Margins

Anyone who has been in dairy farming for twenty years or more knows full well, the margins we once had don’t exist today. What we thought were ‘tough times’, we now realise were luxury margins. When I started share farming in the early “70’s”, costs, including finance costs, were benchmarked at 30% of farm income.

The range of margins across farms has always been variable in line with management and debt, multiplied by a whole raft of variables beyond farmer control. We tend to focus far too much on the influences over which we have no control, weather and milk price being the dominant stressors. This leaves us with influences that are within our control.

I’ve have written many times, the two drivers of farm profit are feed and fertility. Feed drives milk production and income, and fertility drives a herd’s capacity to utilize feed in conversion to milk. This is determined by a herd’s average days-in-milk. Obviously the more fresh cows we have in a herd the higher the milk production will be, provided feed is offered to enable our cow to consume to capacity. This is compounded by cows in early lactation possessing greater feed conversion efficiency.

Below these two pillars of farm profitability lay a variety of ‘foundational’ issues we do have control over, to a large degree. Whenever I go to my banks teller machine to draw cash, it comes up with a statement that 37% of farmers, or a similar, agree agtech is the way of the future. I would question this statement. If we do not have these foundational issues under control, no technology under the sun is going to make one iota of difference to a downer cow!

I guess you know where I’m heading now. I’m no financial wizard to advise on slick accounting techniques to improve your margin.

Sick cows cost money. We track a number of performance indicators on our clients’ farms around feeding efficiency. As any of my nagged clients will tell you I get highly repetitive, especially on dry matter intake, as the key to all else. None of the indicators we study are visible through normal accounting analysis of farm businesses, and therefore, pass under the radar completely unknown, evaporating the gap between feed cost and milk income.

Although the sick cow is thought to be visible, with improved nutrition, especially in transition, clinical milk fever rates have plummeted over the last twenty years. This is very positive, but research knows full well, as is often the case in life, the visible issues were only the tip of the iceberg. Subclinical disease is by far the greatest thief of farm profit and attracts little interest because of its non-visible status.
The non-visible, subclinical milk fever, is usually where the ‘train wreck’ starts, then, precipitates a trail of further metabolic diseases, often referred to as the ‘cascade effect’ of milk fever. Some of these secondary diseases remain under the radar just holding back our cow from rapidly increasing DM intake immediately post-calving and induce ketosis.

By now we have a compromised immune system incapable to dealing with pathogen entering the mammary system even under normal farm conditions. Mastitis plays havoc with fertility due to systemic inflammation from mediators sent out by the immune system to address the infection. Immunosuppression enables metritis to establish. Compromised blood calcium status can trigger LDA’s.

Any or all of these disease scenarios will hamper feed intake, limiting milk production at a stage she was at her greatest potential for whole of lactation production. The likelihood of further disease limitation to both milk production and fertility are high. Subclinical ketosis is well researched as to increase risk factor to other metabolic disease, fertility and recent, although early work at Cornell (USA) indicates ketosis in this lactation will reduce milk production in subsequent lactations, and possibly, whole of life production.

Transition management has potential to make or break our margins and justifies every effort to micro manage cow nutrition through this phase. Following are some costings of disease, commonly seen around calving; 1) Mastitis $420, 2) Lameness $330, 3) Retained Placenta $320, 4) LDA $650, 5) Ketosis $180, 6) Milk Fever $250

From this list it would not be hard to list a few disorders that would completely wipe out a cow’s lactation margin.

Managing Margins is managing transition. Fertility will be a serendipitous outcome. That only leaves feed supply to meet our fresh cow’s appetite to complete successful margin management.

Dry cow/springer cow nutrition is number one in prevention strategies. Tools are available to assist, especially springer cow and fresh cow. Urine pH strips will tell you the springer ration DCAD is or isn’t correct. Milk Keto test strips to monitor for ketosis in fresh cows and alert to the need for treatment. These two on-farm tests can save thousands of dollars of farm margin.

John Lyne is a dairy production specialist with Dairytech Nutrition

www.dairytechnutrition.com.au