Grober Nutrition

Posts Tagged ‘automatic cow feeders’

Principles and Experience

Introduction

Producers have traditionally raised calves in individual pens or hutches. This rearing system has had advantages of individual feeding, observation and reduced risk of cross-contamination. It is however, still labour intensive. Dairy cattle are naturally group-living animals. Group-housed calves can enjoy an early social interaction and learn to understand group behaviour. Research is now proving that well-managed group housed calf rearing systems can provide advantages for both calves and producers.

Automatic feeding systems for group housing

Group housing often requires intensive management. In non-automated group housing individual intake is difficult to monitor. Moreover, sub-clinical or ill calves may be challenging to identify and therefore treat appropriately.

The new generation of automatic feeding systems (like the Förster-Technik model sold through DeLaval, Lely and Westfalia/GEA) can be easily programmed to effectively feed and monitor calves on an individual basis. There is software available to accumulate a significant amount of information and provide detailed data analysis of individual calves and/or the group for high management control with low labour requirements. An example of data collected includes daily milk replacer intake and number of visits to the feeder. Alarms will be triggered when deviations occur. Individual medication, electrolyte/additive administration programs are also available options.

Feeding management

In conventional feeding by pail, calves are fed limited amounts of milk replacer (i.e.) 2-3 litres of milk replacer twice a day, the equivalent of 500-900g of solids. For optimal heifer growth and development calf feeding recommendations have increased to 8-10 liters/day, the equivalent of 1200-1500g of solids, sometimes even more.

The advantages of feeding calves more milk are widely published. Areas studied include calf growth, height, starter consumption, medication use/costs, time management, and the increased output of milk during the first lactation (references available upon request). These published advantages examine the economic impacts of feeding more milk replacer.

Grober Nutrition, based in Cambridge, Ontario is working in partnership with Förster-Technik, a world leader in automatic calf feeding, to establish further on-farm practice and benefits. The concept of smaller meals being offered more frequently could lead to improved digestion and may also aid in the prevention of severe scouring.

Group feeding experience

Grober Nutrition has been evaluating group housing systems for over 20 years and have more recently collated data from CY Heifer Farms (Elba, N.Y.) and the Grober Young Animal Development Centre (GYADC) (Woodstock, Ont.). The trials were set up to examine and quantify the growth, development, medication usage rate and economics of feeding the same amount of milk to group fed calves compared with individually fed calves. The first data set from CY Farms was evaluated based on 582 calves and concluded no significant difference in live weight and growth rate between the two feeding practices. Group fed calves, however, showed a significantly lower medication cost(P<0.05) during the CY Farms trial period compared to individually fed calves. Computer data analysis allowed for earlier detection of illness and labour was reduced by 52%.

The Grober Young Animal Development Centre in Woodstock, Ontario, enables Grober to compare both individual and group housing methods under one roof. This means that nutrition programs, calf-rearing technologies and other calf products can be examined simultaneously under both management systems.

Recent data from the Grober Centre shows that calves in groups exceeded average daily gains compared to individually housed calves starting week 5 and continuing past weaning (see Table 1).

Table 1. Average Daily Gain (ADG) of calves receiving 6L/day of milk replacer as compared between groups and individual pens. (All values reported in kg/day).

blue, red columns with different superscripts are significantly different at p<0.05

While ADG often fluctuates due to environmental and health influences there was no significant difference in average body weight until weaning (week 7). Throughout weaning and post-weaning, calves in group housing achieved a significantly higher average body weight (see Figure 1.

Improved gains may be attributed to the significant increase (P< 0.05) in starter intake from automatic grain feeders prior to weaning for the group fed calves. However, during weaning, calves in individual pens achieved similar calf starter intake compared to group housed calves.

Group Housing & Health

There are perceived health concerns when calves have nose-to-tail contact. Automatic calf feeding machines are a tool for early detection of illness.

Grober Nutrition assessed the cost of medication to evaluate whether group housed calves are more likely to require therapeutic intervention (see Figure 2).

The data illustrates that individual calves suffered significantly more illness early on (i.e. scours).

During week 4, a significant difference in cost was associated with group calves (respiratory illness). Overall, group fed calves showed a significantly lower medication cost compared to individually fed calves. Age, body weight and a higher plane of nutrition may have accounted for more moderate medication use and cost.

Group Housing Considerations

Selecting calves for group housing with automation requires a thrifty calf with a strong suckling reflex. The calf manager should group calves of similar age and body weight. Group housing of calves has many time and labour saving advantages. It provides improved access to space, allowing for more vigorous activity, and with automation, improves feed consistency and number of feeds.

Group housing can facilitate earlier socialization. Moreover, there may be minimization of stress associated with changes in feed and environment post-weaning for calves.

For more details please contact Grober Nutrition at www.grobernutrition.com  or toll free 1-800-265-7863

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Product Profile

A specifically formulated high protein milk replacer for excellence in raising heifer calves.

The Need

Intensive feeding programs have been a major topic for discussion and presentation over the last year. Their aim has been to maximize genetic growth potential, get heifers to breeding weight sooner and also maximize lean tissue growth (height and weight).

A young animal can not be limit fed protein and energy and be successful or efficient in depositing protein as lean tissue growth. During the first two months, calves have the greatest opportunity to maximize rapid early growth. Protein in the diet can be utilized very efficiently at this age. The higher the percentage of protein of the diet (maximum 28%), the better the increase in average daily gain; with a priority on lean muscle tissue deposition over fat. The correct balance of metabolizable energy must also be provided for maintenance and daily gain. Feeding more total nutrients on a conventional program can achieve higher rates of gain, improve health and immune status.

The Feeding

Conventional milk replacer and whole milk heifer calf feeding programs revolved around two times per day feeding and half-gallon or 2 litres per feeding.

Intensive or accelerated feeding programs revolve around feeding more total solids more often. These programs will work on a twice-daily cycle although calves fed more often (i.e.) on automatic feeders or those fed 3 to 4 times per day tend to have a better response. In reality this type of feeding program is more similar to that of the calf nursing on the cow.

If the total volume of milk or milk replacer is limited, a calf will tend to consume calf starter earlier. However, this reduces the calf’s ability to utilize the milk protein portion of the diet and sacrifices growth potential. By extending the liquid feeding period to 7-8 weeks, we can achieve higher gains prior to weaning and a continued benefit post weaning. The ability of the calf or the desire by calves to consume dry feed (starter) is in direct proportion to the volume of liquid feed being offered. To help prevent the weaning stall out, reduce the volume of liquid being fed to achieve a starter intake of 700 to 1000 grams per calf per day, for 3 consecutive days prior to weaning. The calf starter ration, to compliment an intensive calf management program, needs to be highly palatable and of excellent quality. When a high protein milk replacer is being fed (i.e. 26%min.) the calf starter should be at least 22% protein to maintain optimal growth.

As always the availability of clean fresh water is critical to dry matter intake and overall calf health and performance.

Economics

Although the initial cost of an intensive feeding program is higher than the conventional feeding program, it is important to determine the goals of the calf raiser and the finished economics. The true measure of an enhanced feeding program has to be measured in terms of breeding weight & height, calving age, improved milk production and overall animal development.

Grober Excel calf milk replacer is part of a full management program. Please contact Grober Animal Nutrition for more details.

Andre Roy MSc.
Sally Charlton BSc. (Hons)
April 2003