What's in a name?

Every baby needs a good name. The young heifers on our farm are no different. I just finished naming a bunch of calves. All of our cows are registered Holsteins. Soon after the young females are born, we submit their registration papers our breed association. As part of this process, we select names for each of them. 


Tonight, I picked out names for three: ear tag numbers 1113, 1117, and 1121. To make sure I selected the perfect name, I started by looking at their dams' names. (A dam is the mother cow.) 1113 was born to 927, Paula. Paula hasn't had any other heifer calves. In other words, 1113 doesn't have any sisters. Paula's dam is Panda, so it seemed like we should stick with a P name. After browsing some websites with baby girl names, I selected Paisley. Mostly, because it's a cute name, but I personally wouldn't select it for a child.


Next up was 1117, the daughter of 199, Ronnie. Ronnie already has a daughter, Robyn. Obviously, 1117 was going to be a "R" girl. As a kid, I loved reading the Ramona books by Beverly Cleary. 1117 is now officially Ramona. 


Finally, 1121 was born to Robyn, Ronnie's daughter. I guess if you want to get technical, that makes Ramona her aunt? I needed another R name, so I selected Roxy. I bet she'll be spunky. 


If you've followed along, congratulations. If not, don't worry; it can get tricky keeping track of all of these ladies. I'm glad Diane keeps good records!


Moral of the story, every baby needs a good name. 

I hope the stork brings a girl.

In the last post, we talked about A.I. and its benefits to the dairy industry. Today, we'll add another piece to the puzzle and discuss sexed semen, which can lead to a greater possibility of female offspring.

First, here's an important sidenote: only girl cows can produce milk. I'm sure that just completely changed the way you think about nature. :) Therefore, for a dairy farm, cows are the queens. Heifers, or females that haven't calved yet, are princesses. The profitability of a dairy farm relies on females' milk production. When a cow gives birth to a female, that female calf will likely eventually end up giving milk herself.

To increase the odds of having a female offspring, many farmers choose to artificially inseminate with sexed semen. This technology was developed in 1989 by scientists with the United States Department of Agriculture, and it has been readily available since the early 1990's.

So, just how can you sort something you can't even see? Well, scientists inject a dye into the sperm collection. It's fluorescent, and it sticks to the DNA in an amount proportional to the number of X and Y chromosomes in the sperm. X chromosomes (females) contain more DNA than Y chromosomes (males), so more dye sticks to the sperm cells that are carrying female chromosomes.

Next, the sperm cells are sorted. A laser lights up the dye, and the sperm gives off light proportional to its DNA content. The X sperm always glowers brighter, because it's carrying more DNA. The sperm is sorted into two different batches, allowing it to be packaged into doses according to the probable sex of offspring it will produce.

Species from cattle to rabbits to sheep to pigs have benefitted from this technology. On our farm, sexed semen has allowed us to produce more heifer offspring, which will enter our herd and eventually produce milk. It has increased our efficiency and allowed for a consistent supply of heifers. Does the stork really have anything to do with it? No. Science? Absolutely.