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When the heifers are at least 14 months old, you can put yearling bulls (15-20 heifers per bull for yearlings) in with them. Don't put your big mature bulls in with your heifers as this could cause problems later on.

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14y ago
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3mo ago

Bulls can be introduced to heifers for breeding between 12-15 months of age, once they have reached sexual maturity. It is important to consider the size and condition of both the bulls and heifers, as well as ensuring that the heifers are at the appropriate age and weight for successful breeding. Consulting with a veterinarian or experienced cattle producer can help determine the best time to introduce bulls to heifers.

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Q: What age should you start putting your bulls with your heifers?
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What is the maximum age a bull can be to service heifers?

Bulls can generally start breeding with heifers around 12 to 15 months of age, and they can remain sexually active up to 10-12 years old. However, the peak reproductive performance for most bulls is typically between 3 to 8 years of age. After this age, fertility and breeding capacity may decline.


What is the breeding age of a bull?

A bull will often reach puberty by the time he's around 12 months of age (some a little sooner, if the herd's a good fertile herd), and by this time, as a Yearling Bull, he is ready to be used on heifers or sold to another producer's farm or ranch to be used on the heifers and cows there. Some bull calves can show libido when they reach 6 to 8 months of age. Some won't show it until a month or so later. Most bulls should be showing libido by the time they are 12 months old. However, all this depends on the breed and each individual bull. Some breeds that are later maturing (typically Continentals), like Charolais, Simmental, Limousin or Salers, won't start showing puberty until they're around 12 to 16 months of age. Other breeds that are more early maturing (typically British-type breeds) like Angus, Hereford, Shorthorn, Jersey, or Red Poll will start showing puberty as early as 6 to 9 months of age. A lot of producers who raise British bred bulls will start using them on heifers or cows when they reach ~12 months of age. But the best thing to do is to start using the bulls when they start showing signs of sexual maturity: when they show interest in cows or other heifers that are in heat, attempt to mount and ejaculate, etc.


When do you separate calf from bulls?

This question is asked in quite an awkward manner: are you asking about separating young calves (or a young calf) from a herd of bulls, or about separating heifer calves from the bull calves in your herd? Or are you asking about something entirely which wasn't put across very clearly in this question? I'm assuming that you are referring to the middle question: separating heifer calves from the bull calves. The best time to do that is at weaning, which is around 6 to 8 months for a beef herd. When you process your heifers, make sure you give them a shot of lute (or a similar injectable hormone) to make any unknown-pregnant heifers abort, particularly if your herd is highly fertile and the heifers and bulls have hit puberty before they've been weaned, which happens more often than you might think. As for the first question, the calf should be separated from the bull herd immediately, particularly if it's a young animal and needs its dam. A bull that doesn't know what a calf is will physically abuse that calf with the intentions to do harm or even kill. Even though some herd bulls can be great with calves, this isn't true for all of them. This is partly why many producers choose to remove their herd bulls from the cow-herd before the cows start calving.


What are bulls enemies?

Bulls don't have specific enemies in the wild, but they may face threats from predators like lions, wolves, and bears. In the context of bullfighting, humans can be considered their adversaries.


When do pit bulls loose their teeth?

Pit bulls typically start losing their baby teeth and getting their adult teeth around 4-6 months of age. The teething process can be uncomfortable for them, so providing appropriate chew toys can help ease their discomfort. Adult pit bulls should have a full set of 42 teeth once they have finished teething.

Related questions

When do you separate young cows and bulls?

I'm assuming that by "young cows" you are referring to heifers. You should separate heifers and bulls right after they're weaned, which is around 6 to 10 months of age, or before one or more of them are going to start puberty.


What is the maximum age a bull can be to service heifers?

Bulls can generally start breeding with heifers around 12 to 15 months of age, and they can remain sexually active up to 10-12 years old. However, the peak reproductive performance for most bulls is typically between 3 to 8 years of age. After this age, fertility and breeding capacity may decline.


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What is the breeding age of a bull?

A bull will often reach puberty by the time he's around 12 months of age (some a little sooner, if the herd's a good fertile herd), and by this time, as a Yearling Bull, he is ready to be used on heifers or sold to another producer's farm or ranch to be used on the heifers and cows there. Some bull calves can show libido when they reach 6 to 8 months of age. Some won't show it until a month or so later. Most bulls should be showing libido by the time they are 12 months old. However, all this depends on the breed and each individual bull. Some breeds that are later maturing (typically Continentals), like Charolais, Simmental, Limousin or Salers, won't start showing puberty until they're around 12 to 16 months of age. Other breeds that are more early maturing (typically British-type breeds) like Angus, Hereford, Shorthorn, Jersey, or Red Poll will start showing puberty as early as 6 to 9 months of age. A lot of producers who raise British bred bulls will start using them on heifers or cows when they reach ~12 months of age. But the best thing to do is to start using the bulls when they start showing signs of sexual maturity: when they show interest in cows or other heifers that are in heat, attempt to mount and ejaculate, etc.


If the bulls is put with cows on June 6th what is the earliest a cow will calve?

You should start calving season by March 16.


When do you separate calf from bulls?

This question is asked in quite an awkward manner: are you asking about separating young calves (or a young calf) from a herd of bulls, or about separating heifer calves from the bull calves in your herd? Or are you asking about something entirely which wasn't put across very clearly in this question? I'm assuming that you are referring to the middle question: separating heifer calves from the bull calves. The best time to do that is at weaning, which is around 6 to 8 months for a beef herd. When you process your heifers, make sure you give them a shot of lute (or a similar injectable hormone) to make any unknown-pregnant heifers abort, particularly if your herd is highly fertile and the heifers and bulls have hit puberty before they've been weaned, which happens more often than you might think. As for the first question, the calf should be separated from the bull herd immediately, particularly if it's a young animal and needs its dam. A bull that doesn't know what a calf is will physically abuse that calf with the intentions to do harm or even kill. Even though some herd bulls can be great with calves, this isn't true for all of them. This is partly why many producers choose to remove their herd bulls from the cow-herd before the cows start calving.


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