(To know if your cow is bred, the easiest, cheapest, safest, and most accurate method is through Biotracking: http://biotracking.com/?q=dairy/biopryn/howtouse)
Okay, you want to breed your cow… And you have a specific idea of what you want from your dairy cow or heifer. Where do you go from there? For the sake of keeping things specific, I am only going to talk about breeding using Artificial Insemination (AI) and using dairy semen, not beef or specialty semen. If you are going to be using a bull, scroll to thebottom of the page for a few tips on bull breeding. Because I am a Jersey breeder, I’ll also be sticking to Jerseys in reference, though the system works for all dairy breeds, with minor variations.
FIRST, KEEP YOUR OWN RECORDS!
I have sheets pre-printed with room to write in information from each breeding and calving.
NOW, FOR BREEDING YOUR COW…
TIP: Please do this well in advance of when you NEED the service! Finding someone to AI your cow takes time, shipping or purchasing semen can take time, from one week to two months, depending on your location. Then, you have to get your animal ready and watch her heats so you can tell the AI person about when you will need them to come out and service your animal. Then, you will have to keep their number and call them when you see your cow in standing heat. The AI person should ideally come out about 12 hours AFTER you start to see standing heat.
Gestation Chart Calendar: “Service on date given in first column should bring calf on date given in second column (+/- 14 days).”
Depending on your breed, the average date of 283 days may be different than the above chart. In that case, take your breed and add or subtract the number of days difference for your breed. For example, a Jersey cow is on average 278 days, so if the cow was due on September 10th according to the chart above, you would subtract 5 days (283-278=5 days less) for a predicted due date of Sept. 5th.
For full article information on the above chart, see: http://jas.fass.org/content/4/1/13.full.pdf
These are things you need to think about so your AI tech can help you find the best bull for what you want:
- Should the calf be Male, Female, or does it even matter? (Sexed semen is an option: More expensive, less chance of settling on first breeding, much higher chance of heifer.)
- Is it more important to improve your breeding in your offspring, or is it most important to get your cow bred asap? (Young sires or a home bred bull will have more sperm per straw, unlike active AI sires. But, you lose the helpfulness of “proofs” which tell you what kind of daughters the bull produces. This option leaves you only picking from pedigree.)
- If you want a replacement heifer, what qualities would you like to improve on your cow? (Some bulls have better traits than others, what is more important to you?)
- What do you not want to change about your cow? (For example, if your cow has great udder cleft and you really want to keep that, make sure you use a bull that will protect udder cleft.)
- Is ‘calving ease’ important? (Consider a bull that gives small calves, or consider a smaller breed of animal to cross breed. For example, if you had a Holstein, try breeding to Jersey, at least for first breedings of heifers.)
- Is your cow reproductively sound, or do you need to find a bull that will improve Daughter Pregnancy (DPR)?
- Who is going to perform the AI? Are they limited in their selection of AI companies or bulls available to them? (Examples are Select Sires, Semex, ABS, Genex, Taurus. Each company has a “lineup” that they use. Most areas have reps from different companies, but you need someone that is going to breed your animal, not just sell you the semen.)
- How much milk do you want the offpsring to give? More or less milk? Are equal or higher butterfat and protein components important? Is your cow always high in somatic cell? (Check the bull proofs!)
- Are you more concerned about TYPE (frame, longevity, and udder conformation) or PRODUCTION (milk quality)? (Type=Look for a young sire or go through Semex, which will offer you more choices from Canadian lines. Production=Most active AI bulls are very good in production, the issue is finding one with the qualities you want.)
- Having registration papers on hand with a three generation pedigree is very helpful to prevent inbreeding. Make sure you have a copy to show your AI tech!
LEARN TO READ BULL “PROOFS”
A. Find your A.I. company online by google-ing the name of your chosen AI company, or any major company, if you have options. If you don’t know which companies are available to you, go to http://www.naab-css.org/db/xrefpart.html and look up someone closest to your location and call them.
B. Ask if they are available to come and AI your cow. If not, ask them if they know of anyone near your home that might be available to help you. If they are available, ask them how much they charge for AI. And do they charge extra for mileage to drive to your home? Is the cost of semen additional? Do you have choices for bulls in your breed that you are looking for? If you find your own semen, would they be willing to hold 5-10 units for you if you have it shipped to their location?
C. If you want to know how companies come up with the numbers in bull proofs, check out this page from Select Sires: http://selectsires.com/dairy/genetic_explanation.aspx
- Sire’s Registered name: SHF Centurion Sultan
- …SHF = farm name where he was bred
- …Centurion = his SIRE
- …”S” indicates his mother was also an “S” name, Success)
- CANM10201207: Registration in Canada, Male, Registration Number
- aAa – A simple mating system. There are 6 numbers (1=Dairy 2=Tall 3=Open 4=Strong 5=Smooth 6=Style ). Most bulls are given a number which reflects what they will give to their daughters through a mating. Cows are scored on what needs the most improvement. So, a 165 bull would be mated to a 165 cow, meaning that his best traits would help fix her three least best traits, in order to improve up that cow’s offpspring.
- DMS – A similar mating service which focuses on health, production and reproduction. Bulls and cows are coded in a same way as the aAa system, with the hope of creating a well-balanced daughter.
- Kappa Casein- A key protein in cheesemaking that bulls can transmit to their daughters. Complicated, but BB is good for cheesemakers.
- Three generation maternal pedigree. Dam is Success. Grand-dam is Leanne, Greatgranddam is Nan. Next to each cow is the sire she was bred with to result in the daughter shown.
Milk, Protein %Protein, Fat %Fat – Positive numbers “reflect the expected production of future mature daughters.” Positive percentages mean the bull’s genetics will INCREASE milk or fat or protein production. A negative (or minus) bull tends to DECREASE production in his daughters.
%Reliability – How reliable are the numbers that are shown? Generally, only bulls above 70% reliability are even worth considering, if you are basing your judgement on numbers. Bulls at 99% or thereabouts mean that you will likely get a daughter that looks a lot like what the graphs and numbers are showing (good and bad qualities!). From now on I won’t mention reliability, as any “reliability” will reference the trait closest/above it.
Dtrs/Herds – First number is how many daughters were used to form the information (through DHIA records). Generally, higher numbers raise reliability. Second number is how many herds those daughters are in. Numbers are more reliable if you use more herds. For example, if you had a great looking bull, but his daughters only came from two herds that had really good cows, he might not be a great bull. It might be that the mothers of his offspring are compensating for his lacking qualities. If the bull is used in multiple herds, the difference in cows bred to the one bull will increase and provide more reliable information about what the bull is offering genetically.
Somatic Cell Score- Scores below 3.0 indicate lower somatic cell, which reflects resistance toward mastitis. Above 3.5 means that bull’s daughters tend to have more problems with mastitis.
Productive Life – Simply, how long will this bulls offspring survive and be productive animals? The number measures months of productive life on average, so higher numbers would indicate longer living animals.
DPR – Daughter Pregnancy Rate – 1.4 means that bull’s daughters are 1.4% more likely to concieve than the agverage cow.
SCR – Sire calving rate identifies how fertile a bull is as a service sire.
Type – An overall score reflecting the type traits by taking the appraisal scores of his scored daughters and calculating how superior (or inferior) that bull will be in type. The higher the number, the more superior the bull will be in passing on positive type traits.
Dtrs/Herds – Reflects how many daughters and herds were used to compute the information (through the appraisal system).
JPI – Jersey Performance Index – Action is 186, so he is 186th highest of all scored bulls. You can compare him with other bulls above and below him. The Index is rated by comparing fat, protein, functional traits, somatic cell, productive life, and functional udder.
Country – Where the bull is registered.
JUI – A calculation based on udder traits. The higher the number, the more ideal of an udder this bull will pass on. Action is one of the highest bulls in JUI, at 8.26 (as of March 2009)!
Stature – Action makes his daughters medium-tall.
Dairy Form – Extremely dairy.
Strength – Slightly stronger, but be careful to only breed to cows with strength.
Body Depth – Does not add depth or take from, but you’d like to see it more to the right.
Rump Width – Same as body depth, this is Action’s biggest fault.
Rump Angle – Slightly sloped, ideal!
Legs Side View – Slightly sickle, so you’d want to breed him to cows that already have straighter or even posty legs.
Foot Angle – Pretty steep, so lots of heel. Their feet will last a long time.
Fore Udder Attachment – This is why his JUI score is so high! Wonderful!
Rear Udder Height – Avery, Action’s sire, is where the high rear udder comes from.
Rear Udder Width – Lots of width. Will give a cow more room for milk production and a nice, squared rear udder.
Udder Cleft – Any bull you look at should ALWAYS be positive in cleft and the more the better. This is a very important trait for longevity.
Udder Depth – Very shallow udder. You can see up on the chart to the left that he is “plus” in milk, but the udder is still shallow, meaning they milk a lot, but you won’t have a huge saggy bag!
Front Teat Placement – Very close. This means the teats are more likely to be square under the udder, which also increases the chances of udder longevity. Plus, square teat placement makes it much easier to milk by hand or attach a machine.
Front Teat Length – Action lengthens teats. This is only important if your cow has either really small or really large teats that you want to correct. For hand milkers, this is an important quality to check out, though!
Genetics and Bull Selection
Jerseys come in many styles. Understanding genetics can help you determine which type of bull you want to use.
1. AMERICAN – Bred for high production (20-35,000 lb. per lactation) with most focus on overall milk production and udder quality. Be cautious about type scores and longevity issues. www.selectsires.com is a broad-reaching U.S. A.I. company. Forest Glen, Molly Brook, Brentwood (BW), Sunset Canyon are well-known American breeders. Famous bulls are: Brook, Jace, Hallmark, Beretta, Sambo, Centurion, Duncan, Barber, Avery, Pitino, MC Tops, Paramount, Counciller.
2. CANADIAN – Tall, stylish dark animals with a major focus on conformation. Their major fault would be lacking softness of udder and lowered milk production (although very well-attached udders!). www.semex.com is the most well-known CAN A.I. company. Rapid Bay, Bridon, Hollylane, Giprat, Pleasant Nook, Rock Ella are examples of well-known CAN breeders. Famous bulls are: Renaissance, Remake, J Imperial.
3. NEW ZEALAND/AUSTRALIAN – Cattle bred to thrive on a heavily grass-fed system.
4. DANISH – Similar to American, but with a higher focus on maintaining high components (ie. 25,000 lb in a lactation, with 5.2% butterfat). From what I’ve seen and heard, these Jerseys can tend to lack dairy form and udder conformation. They are sold through U.S. A.I. companies. The farm prefix ISDK is a well-known Danish breeder. Lemvig is a well-known Danish sire.
Some bulls worth considering:
- 200JE303 SHF CENTURION SULTAN
- 200JE131 BRIDON REMAKE COMERICA
- 200JE9826 BW SUREFIRE
- 200JE149 BRIDON VINCENT (Sexed semen available)
- 200JE427 SELECT-SCOTT MINISTER
Through Select Sires:
- 7JE860 Maack Dairy Eclipes-P
- 7JE867 Griffens Governor
Good Bulls to have in your genetics:
- 7JE177 HIGHLAND MAGIC DUNCAN
- 29JE2875 HIGHLAND DUNCAN LESTER
- 7JE356 LESTER SAMBO
- 7JE159 SOLDIERBOY BOOMER SOONER OF CJ
- 122JE5063 BANCREST LESTER AVERY
- 7JE342 ALTHEAS LES PITINO AL-TOP
Below is a list of websites that I use very frequently when researching Jersey genetics:
NAAB Database, basic database to look up any active A.I. bulls:
Canadian Dairy Network, to look up Canadian A.I. bulls:
Jersey Canada, you can look up pedigree information free:
US Jersey provides various areas of information about Jerseys: http://www.usjersey.com/
Note: If you have a Jersey registered in your name, you can go to US Jersey and click on the link to “Info Jersey” where you can recieve a password and look up American genetics online.
Bull information is found at: http://greenbook.usjersey.com/
USING A BULL FOR BREEDING YOUR COW:
- Ask for the bull’s pedigree. Does he have any daughters already that you can look at? Is his mother still alive and can you go and see her?
- Tritrichomonas foetus, a protozoan organism, can be passed during intercourse and can cause infertility. Ask if the bull has been tested for this.
- Where will the breeding take place? Do you have to haul the cow to them or can he bring the bull to you? If you bring a bull to your farm, you risk a high liability issue. If you take the cow to the bull, find out where they will do the breeding. Make sure the ground is level so the cow has stable footing.
- How much do they charge?
- If your cow is older and having a hard time getting bred, bull breeding is more reliable than A.I. for conception.