Times have changed in the dairy industry.
An industry that used to have most of its profitability model driven by milk production suddenly has been thrust into a new age.
One might argue a black and white age.
Drought, retirement and years of challenging beef markets has feedlots turning to America’s dairies for help. Opening up their coffers at an unprecedented level, all to answer the growing shortage of beef cattle inventories.
This new cash infusion has ushered in a new age for dairy producers. In this age up to 2/3 of their dairy cow’s annual profit could be driven not by milk, but by the type of calf she has on “Day 0" of that lactation.
According to CattleFax and the American Farm Bureau Federation America’s dairy farmers have embraced this new model. Purchases of beef semen by dairy producers has gone from 2 million units in 2014 to almost 10 million in 2024. There are even whispers of some dairies changing their business model from milk as a primary production goal. Instead thinking of it as a secondary by-product of a system made to make as many dairy-beef cross calves as quickly as possible.
This mentality shift means that some of our dairies will see upwards of 50 to 75% of their cattle receiving beef semen. Creating ever increasing numbers of cross calves while using cheaper semen often with better conception rates.
However, there appears to be unintended biologic side effects from this shift. One of which is a backup in our pre-fresh pens.
Talk to any dairy and they will share with you the story of the dairy-beef cross that is 8-10 days overdue. They’ll often ask me what should we be doing with these animals? A complex question and best handled on a case-by-case basis with your herd veterinarian.
But it’s not these outliers that are causing issues on our dairies.
It’s the less noticeable example. Cows are going 2-7 days over the 278-day gestation we’ve come to expect from our Holstein cattle. These cows put undue strain on our pre-fresh pens; designed for 45–60-day dry periods.
Prefresh groups can quickly backup with dry periods going >70 days and pre-fresh pens becoming over-crowded. These small changes in cow flow cause significant issues in the post-fresh pen; risking 2-3x increases in fresh cow disease.
According to ICBP, the largest Beef Genomics database in the world, in general our beef breeds can be expected to go 4-12 days past the expected 278-day gestation. If our industry wants to truly embrace this model, then we will need to adjust our management.
A good start is to work with your herd vet and stud to investigate your current gestational averages by semen type. If you identify problem sires you can consider shortening dry period length for the affected groups, change semen breed type, or examine expanding your facilities to accommodate the 6-20% increase in pen duration.
Also, keep your ears and eyes open. Researchers continue to identify genetic markers for determining gestational length. It’s not inconceivable that in the coming months to years these markers, or an index combining them, could be added to your bull proofs.
