When she goes into heat or estrus. Check out the related question below.
When she goes into heat. A cow can only be bred if she's in heat. If not, then it's not worth the effort to breed her. See the related question below.
A cow that is close to calving, and is far along in her gestation period.
The cow was bred on December 26, 2008, since the average gestation period for all cows is 285 days long.
Most likely, yes. Did you know that there's a breed called a Beefalo? This breed is a result of breeding an American bison with a domestic cow. So if an American bison can be bred with a domestic bovine and produce viable offspring, then there's nothing wrong with breeding an African Buffalo with a domesticated cow. Make sure, though, that you breed an African Buffalo cow with a domestic-bred bull that has good calving-ease numbers.
It could be that she's going into heat, and is ready to be bred. Her calf would be around 2 months of age (or 45 to 60 days old) by this time.
When she goes into heat. A cow can only be bred if she's in heat. If not, then it's not worth the effort to breed her. See the related question below.
Oestrous is when the cow shows "heat" meaning she is ready to be bred.
A cow IS female. A cow is a female mature bovine that has had a calf. However the general population tend to refer to a " cow" as a more general term for any bovine of the Bos taurus or Bos indicus species, particularly if they can't tell the sex of the animal from near or far.
A bred cow or a pregnant cow, or, in the dairy industry, just a cow. In sale barns, if she has a calf at side, she is also referred to as a 3-in-1 or a three-fer or suckling bred cow. If she's lactating, like in a beef or dairy herd, then she's called a nursing bred cow, lactating bred cow or bred lactating/milking dairy cow. If she's not nursing or lactating, she's called a dry bred cow non-lactating pregnant cow if you really want to get technical. In the dairy industry, a lactating heifer that has already had her first calf is referred to as a first-calf heifer; once she has a second calf she is generally referred to as a cow. In the beef industry, a heifer that is pregnant with her first calf is called a bred heifer.
Bred cow.
You get to know her and she gets to know you and is comfortable around and with you by the time she is ready to be bred and calve.
A cow that has NEVER had a calf in her lifetime is called a Heifer. A cow that has not had a calf YET is a heavily pregnant or heavy-bred, or a short-bred or long-bred cow. A cow that has not had a calf during a calving season is called a barren cow, an open cow, a cystic cow, a cull cow, a meat/slaughter cow, a poor cow, a free-loader, etc.
When the female is ready the male will know.
It's just like knowing when to put the bull out with the cows: When they're not pregnant and are ready to be bred. Most often it will be the cow herself that will tell you when she is ready to be bred, but you have to judge when the right time would be to AI her. Ideally 45 to 60 days after calving is when you should consider getting her bred. AI needs to be performed 12 hours after her first signs of heat.
A heavily pregnant cow, or a long-bred cow. Or, a cow that is expecting soon.
Yes.
No such cow exists! I don't know how or why you would do this, unless it's for some sort of scientific experiment you are doing to compare different breeds with Herefords.