Canadian Bred Animals Live Longer
One of the biggest upfront expenses dairy producers face is rearing heifer calves to maturity.
In Australia, on average, it costs a producer $1500 to rear a heifer from birth until she is two years of age, when she historically calves and joins the milking herd. The longer she then remains a viable part of the milking herd, gives her logically longer to repay the initial investment.
With the industry having a naturally sharp focus on opening dairy prices in recent weeks, longevity undoubtedly has a subtle but vital role to play to play in the bigger picture of bottom line costs.
Research recently revealed that Canada leads the world for offering traits that support longevity, ahead of the US, Germany, the Netherlands and France respectively.
Canada’s Dairy Network’s (CDN) Brian Van Doormaal confirmed that Canada had deliberately responded to the global longevity challenge.
“In the minds of many people, especially producers, longevity is understandably the most important trait associated with dairy production,” Brian said.
He said longevity was a reflection of a successful combination of many traits and from a genetic perspective the ideal was to breed dairy cows that had the genetic potential to withstand voluntary culling.
“And, given that voluntary culling does occur in all dairy herds, which prevents cows from staying in the herd as long as they are physically able to, perhaps the best measure of longevity in a population is the average age of cows that die of natural causes such as old age,” Brian said.
Using the measure of old age, the average Holstein cow in Canada has the potential to live to 9.1 years of age, with 6.8 years of productive life (just shy of six productive lactations).
“The length of time that a cow remains in the herd reflects her ability ... Read More...

























