[Prev][Next][Index][Thread]

GRAZING HEALTH ARTICLE



2/17/97
						
GRAZING SYSTEM KEEPS ANIMALS HEALTHIER, RESEARCH SHOWS
	
	
LEWISTON, Minn. — Some dairy farmers taking part in a unique Minnesota-based 
research project are seeing their herd health costs dropping well below the 
average for other milk producers in the area. 
	
A recent analysis of the financial state of the operations involved in the 
Monitoring Team, an on-farm sustainable agriculture research project, flagged 
the reduced animal health costs. 
	
One Monitoring Team dairy farm saw its proportion of gross income spent on 
health costs drop from 4.8 percent in 1990 to 1.5 percent in 1995. Another 
milking operation involved in the project had a health bill in 1995 that was 
less than half a percent of its gross income. 
	
In comparison, the average proportion of gross income spent on herd health care 
by a sampling of 17 dairy farms in the Southeast Minnesota Farm Business 
Management Association was 4.7 percent in 1995.
	
The Monitoring Team is a joint effort of the Land Stewardship Project, the 
Minnesota Institute for Sustainable Agriculture and the Sustainable Farming 
Association of Minnesota. It is a 25-member team that includes six farm families
using management intensive grazing. Also on the team are biologists, soil 
scientists, an economist, a rural sociologist and government agency staff. The 
team has been meeting for three years to research user-friendly ways of 
monitoring a farm’s transition toward environmental, economic and social 
sustainability. 
 	
Team members credit management intensive grazing for the lower health bills. 
Also called timed grazing, this system allows the animals to harvest their own 
feed by rotating them through a set of paddocks. Livestock production experts 
say the system reduces overgrazing, allows fertilizer (in the form of manure) to
be spread evenly and efficiently, and reduces a farm’s reliance on expensive 
inputs.
	
And now it appears reduced health costs can be added to the list of management 
intensive grazing’s advantages. 
	
Farmers and researchers believe the lower health costs are a result of 
management intensive grazing’s ability to closely replicate natural processes, 
allowing ruminates to develop the kind of physical and biological systems that 
make them resistant to disease and injury. 
	
“I think reduced health costs is a pretty common observation among management 
intensive graziers,” said Dennis Johnson, a University of Minnesota animal 
scientist. “The animal is more fit than in a confined situation.”
	
An example of where natural cow fitness can directly reduce health costs is in 
the case of “displaced abomasums.” This is a condition where the cow’s fourth, 
or true, stomach changes position inside the body cavity. It slashes production 
and, if left untreated, will eventually kill the cow. It’s a fairly simple 
procedure to have a veterinarian sew a wayward stomach to the abdominal wall, 
but such an operation costs $100 to $150. 
	
That’s one expense New Prague dairy farmers Dave and Florence Minar don’t have 
anymore. For 24 years, the Minars produced milk under a system that kept the 
cows totally confined year around. Five years ago, their 100-cow  operation, 
which is part of the Monitoring Project, switched to management intensive 
grazing. Their health expenses have been plummeting ever since — from nearly 5 
percent of total gross income to less than 2 percent today. 
	
Dave said besides the elimination of displaced abomasums, the farm has seen a 
reduction in overall digestive, reproductive and foot problems. He attributes 
the reduced health problems to better muscle tone on the part of the cattle; 
they get plenty of exercise, even in winter when the Minars spread hay in a 
manner that requires the cattle to walk on a regular basis. 
A grass-based diet also provides cattle with an opportunity for their natural 
digestive system to develop.
	
But simply letting the cows roam at will may not make them as bright-eyed and 
bushy-tailed as they can be. Research in Vermont has shown that herds under a 
management intensive grazing system are even healthier than those on permanent, 
non-rotated pasture. Dave believes moving cattle to fresh grass frequently is 
crucial to keeping them healthy.
 	
“They’re on clean pasture every 12 hours — a pasture that’s been sanitized by 
clean air and sunshine for 30 or 40 days,” he said.
	
Economists have argued that the increased health costs of confinement milking 
are more than made up for by the greater production such a system brings. But 
farmers using management intensive grazing often find it more economical to 
concentrate on profitability rather than overall productivity, said Johnson. 
	
A study conducted at the University of Minnesota North Central Experiment 
Station in 1991 and 1992 found that although a herd under management intensive 
grazing had a 7 percent lower milk yield when compared to its confined 
counterpart, reduced production costs resulted in a $48 higher average net 
return per grazed cow. 
	
For more information on the Monitoring Project and its research, contact Richard
Ness, LSP, 180 E. Main St., PO Box 130, Lewiston, MN 55952; PHONE: (507) 
523-3366.