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It's a common conception that a small bull will sire small calves. However this isn't always true. A bull, regardless of its size, must be proven to have the genetics for light birth-weight calves. A young small bull may have the genes for this, but there's a chance, since they are unproven, that they may be ones that have the potential to sire large calves. For example, when you get an unproven (or virgin) bull with an EPD BW (birth-weight) value of, say, 1.0, but the accuracy percentage is around 40 to 50%, there's a 50 to 60% chance that he may sire large calves. The higher the accuracy percentage, the higher chance he may be a low birth weight bull. The EPD value and the accuracy percentage changes with every calf he sires.

The other reason (and this is not just a conception, it's proven fact) is that smaller bulls are lighter and easier on heifers than larger, mature bulls are. A big bull riding on a small heifer will put most, if not all, of his weight on her hindquarters as he breeds her. This will affect the heifer down the road when she has to give birth, and may end up going down and not being able to get back up again due to a pinched nerve or an injured pelvis that may not have been noticed by the producer until calving time. However, a trained eye can notice of a big bull has caused some damage to a heifer by the way she walks. She may act like she's a bit sore in the hindquarters, for instance, such as having trouble getting up or walking. Smaller bulls are easier on heifers because they are not heavy, they won't cause such problems to heifers and may be easy on a producer's pocket book as far as vet bills and less chance of loosing heifers to injured or broken pelvises are concerned.

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What is a heifer bull?

Heifers have smaller pelvic areas than mature cows do, so they need to be bred to a bull that has, genetically, low birth weights. Heifers are also best bred to yearling bulls(primarily 12 to 18 months of age), which are smaller than the bigger mature bulls and won't increase the chances of crippling the heifers when trying to mount them. Young and/or small bulls tend to have the genetics for siring smaller calves, and heifers have the body size that tend to develop small calves, however, in either case this does not always occur: Yearling bulls are primarily unproven bulls; small bulls may sire large calves; Breed of the yearling bull plays a part in low birthweight genetics; condition, feed and environment play a role in lowbirthweight rates in heifers and cows. Young bulls are not the best because 99% of the time they are unproven sires. In other words, they are virgin bulls, or have never mated with a cow or heifer and produced offspring. They are selected by the rancher because they are expected to produce low birthweight calves out of the heifers, only because the Expected Progeny Differences (EPDs) combined and calculated from the sire and dam, and compared with other bulls of the same breed and raised in the same conditions, says so. Smaller bulls also need to have the EPD numbers to be able to be used on heifers. If there are no papers that come with a small bull that you buy, you are making a big gamble on him. Even EPDs on yearlings are not reliable, especially if you have a 60% chance that that bull will sire large calves instead of small ones. Thus young unproven bulls may have high birth weights that should not be used on heifers; the same goes with smaller bulls. Breed also has a large affect on how the heifers calve out, and what size of calves the bull will sire. For instance, a yearling Simmental bull is put in with about 20 Red Angus heifers. Low birth weight EPDs for the Simmental breed is different from the low birthweight genetics of the Red Angus breed, so there's a higher chance that 10 or 15 of those Red Angus heifers will need assistance. Even using a Red Angus yearling bull that may have the numbers for low birth weights may not sire low birthweight calves in all of the heifers. But, primarily using a Continental bull that is of a breed that is notorious for large calves, like Simmental, Charolais, Maine Anjou and Belgian Blue, for instance, on your heifers, is asking for trouble. Small bulls like Dexters, White Park, Red Poll, etc. tend to sire small calves that are easy for your heifers to pop out. So heifer bulls are chosen through careful selection of genetics, size and breed, with the type of heifers in mind, in order to have a successful, worry-free calving season. If you know what to look for, you will have some happy heifers on your hands.


When should a young heifer be put in calf?

Young heifers, as in heifers that are younger than 6 months of age, should NEVER be bred to calf, as this is much too young for them and too hard on their growing bodies. The youngest a heifer can be bred at is when they are 15 months old. Most heifers reach puberty by the time they are 11 or 12 months old, but shouldn't be bred until they are either 60% or 70% of the average weight of the main cowherd, or reach 15 months of age. Most of the time it is the weight that many cattle producers rely on for best calf production of the heifers, as sometimes a heifer that reaches 15 months of age is still too small to be bred.


How old does a Brahman bull have to be to service a heifer?

It should be a more of a concern of how much the bull weighs over his age. The bigger the bull, the more likely he'll cause injury to the heifer. Usually the older the bull is the bigger he'll be. Yearling bulls are best used for heifers, more often those that have EPDs for small calves. Brahmans are typically later maturing, so a two-year old bull may be old enough to service a heifer.


Why do some bulls have a hump?

ALL bulls should have a hump or crest. A muscular hump on their necks is a sign of adequate masculinity and good fertility. They are what cattle producers call "superior quality sires." A bull with no or a very small hump on its neck is a bull that is inferior, with poor fertility, poor muscling, and lacking in masculinity. These kind of bulls shouldn't be used for breeding females, and should be slaughtered for beef or sold as bologna bulls.


This is a name given to a male cow near Palmerston north?

A name given to a male cow is bull. Bulls is also a small town and farming area, near Palmerston North, New Zealand.

Related Questions

What is a heifer bull?

Heifers have smaller pelvic areas than mature cows do, so they need to be bred to a bull that has, genetically, low birth weights. Heifers are also best bred to yearling bulls(primarily 12 to 18 months of age), which are smaller than the bigger mature bulls and won't increase the chances of crippling the heifers when trying to mount them. Young and/or small bulls tend to have the genetics for siring smaller calves, and heifers have the body size that tend to develop small calves, however, in either case this does not always occur: Yearling bulls are primarily unproven bulls; small bulls may sire large calves; Breed of the yearling bull plays a part in low birthweight genetics; condition, feed and environment play a role in lowbirthweight rates in heifers and cows. Young bulls are not the best because 99% of the time they are unproven sires. In other words, they are virgin bulls, or have never mated with a cow or heifer and produced offspring. They are selected by the rancher because they are expected to produce low birthweight calves out of the heifers, only because the Expected Progeny Differences (EPDs) combined and calculated from the sire and dam, and compared with other bulls of the same breed and raised in the same conditions, says so. Smaller bulls also need to have the EPD numbers to be able to be used on heifers. If there are no papers that come with a small bull that you buy, you are making a big gamble on him. Even EPDs on yearlings are not reliable, especially if you have a 60% chance that that bull will sire large calves instead of small ones. Thus young unproven bulls may have high birth weights that should not be used on heifers; the same goes with smaller bulls. Breed also has a large affect on how the heifers calve out, and what size of calves the bull will sire. For instance, a yearling Simmental bull is put in with about 20 Red Angus heifers. Low birth weight EPDs for the Simmental breed is different from the low birthweight genetics of the Red Angus breed, so there's a higher chance that 10 or 15 of those Red Angus heifers will need assistance. Even using a Red Angus yearling bull that may have the numbers for low birth weights may not sire low birthweight calves in all of the heifers. But, primarily using a Continental bull that is of a breed that is notorious for large calves, like Simmental, Charolais, Maine Anjou and Belgian Blue, for instance, on your heifers, is asking for trouble. Small bulls like Dexters, White Park, Red Poll, etc. tend to sire small calves that are easy for your heifers to pop out. So heifer bulls are chosen through careful selection of genetics, size and breed, with the type of heifers in mind, in order to have a successful, worry-free calving season. If you know what to look for, you will have some happy heifers on your hands.


Is there any different methods used for heifers when they are put in calf?

No. Heifers are bred the same ways other cows are, with natural service via a bull, or artificial service via artificial insemination. Only difference with natural service is that the bull must be young or small to prevent any potential back or leg injuries. Big mature bulls are very heavy, and a big mature bull mounting a small growing heifer can cause a train-wreck waiting for a place to happen.


How old should your dog be to be mated?

For a small dog; on her second or third season at 2 years old. For a large dog; on her third season at about 3.


What are some different types of bulls?

There are a fair number of different types of bulls: - Mature bulls - Bull calves - Yearling bulls - Virgin bulls - Old bulls - Mean bulls - Heifer bulls - Big bulls - Small bulls - Weaned bull-calves - Young bulls - Herd bulls - [Insert breed here] bulls - Fighting bulls - Bad bulls - Good bulls The list goes on.


What does a afrikander cattle look like?

They are usually large withe large horns, longer than the length of their skull with a slight curl, they usually have a small hump on the back that is more prominent on bulls than cows or heifers, as far as I know they also come in most colors, but defenitely come in red-brown.


What is the center of a dartboard?

The very center is the double bulls eye, and the small ring around it is just bulls eye.


What is the center of a dartbroad called?

The very center is the Double Bulls eye, and the small ring around it is the Bulls eye.


When should a young heifer be put in calf?

Young heifers, as in heifers that are younger than 6 months of age, should NEVER be bred to calf, as this is much too young for them and too hard on their growing bodies. The youngest a heifer can be bred at is when they are 15 months old. Most heifers reach puberty by the time they are 11 or 12 months old, but shouldn't be bred until they are either 60% or 70% of the average weight of the main cowherd, or reach 15 months of age. Most of the time it is the weight that many cattle producers rely on for best calf production of the heifers, as sometimes a heifer that reaches 15 months of age is still too small to be bred.


What are the pros and cons of keeping twin heifers to raise as replacement cows?

This really isn't a matter of "pros and cons", it's more a matter of personal choice. Most twin heifers are born small to begin with, and you may end up with heifers that are too small to meet requirements as replacement heifers, unless the dam or a serrogate cow can give them lots of milk that equals what a cow can raise one calf with. You may end up choosing just one of the twins to keep back and have that twin on her dam and you raise the other via bottle.


What is the center of a dartboard called?

The very center is the double bulls eye, and the small ring around it is just bulls eye.


Can small dogs have a boyfriend?

Well, if your dog mated with another one, then technically it would be its boy/girlfriend.


What do people do in Running of the Bulls?

The Running of the Bulls is a prestigious Spanish event where a small group of Bulls run across the towns streets. People run in front of the bulls for approximately 800m, wihere at least 200 people are injured every year.