I have 100 cows how many can i breed in 5years good conception and low mortality how many breeders wil i have?

Question

I have 100 cows how many can i breed in 5years good conception and low mortality how many breeders wil i have?

Answer 1

There is lot more to running a cattle operation than what I  give in to get an answer. But here is and example or two to give you an you an idea.

If the cows are 8 years old and don't want to keep them past 11 all need replace in them in 3 years and if you wait to breed heifers as coming 3 year olds and have very good calf crops of 95% and low death losses of 1% you will have about 139 heifers after 3 years an 97 of the cow you started with. Of those heifers at lest 25% won't be acceptable for cows for one reaon or the other so the forth year you will have at most 38  heifers from the fist year and the old cows will be gone, The 5 year you will only have 37 more to make 73 for the 5th year to breed.

If on the other hand the cows are young the 3d year you 97 old 38 new ones for 135. The 4th year 37 more and 134 form last year cows for 171 and 170 the 5th year and 36 new ones for 206.204 the forth year and 36 more new cows the fifth year for 260.

The figures I use are good enough for an example but if used for  home work you better not use them. They are  too good to be true. You need to go find out realistic values for all those I used and few more that have to with calving heifers. Those and a realistic breeding program will make the herd closer to 180 cows at most and you would still be keeping some heifers you would be better off with out.

The best case gets a lot better if you beed heifers as coming two year olds. I exepect it is almost univrsal today. But made the example for breeding the as comming 3 year olds so anyone that uses it for home work has to work the the poblem.

There are a lot more things that go in to getting a correct answer than I show.

The answer depends on the breed you have their age and how hard you cull the heifer's hold back an put in your herd. Also it strongly depends on your breeding program and if you use bulls or artificial insemination.

The breed can make a lot of difference in how long a cow is an economic asset in you herd. Normal good practice for range cows is to replace them if trier still in herd when their 9 or 10. If you have Herefords most will be gone by then culled at the first sign of cancer on their eyelids due to unpimented skin in the sun. On the other hand I knew a long horn cow that had her 22d calf the year she was 21. That was the last time I saw her but I know people that saw her alive 2 years  later I don't know if she had calves. She went with a place I rented. The deal was I got the place and her calf but not her. She was to stay with the place 'til she died. That old long horn cow outlasted the man and wife that bred her and owned the place by a lot of years.

Long horns are longer lived than modern beef cattle but the market doesn't reward that very well.

To answer your question you ask you need to include these at the the minimum:

The age distribution of the cows.

The age you let them have the fist calf.

The breed of cow and bulls or s***n you plan to use.

how much money do these cows have to make to go toward paying off land and their purchase and if they have to generate the money for their own up keep. Or is there plenty of money and you have other goals. I have worked on both kinds of operations and I know how to make either one work. But I need to know what you want to do.

A definition of the operation that includes:

Is it range operation with lots of grass an not much feed and only protein  is normally fed in winter or small holding of land with more intensive management and normally one where more grain and protein would be fed year round than just in winter.

The amount of land you have to run them and the weather can have a lot to do on how many you keep too. For example the Ranch my great grand parents settled in 1871 has had over 600 cows is down to 180 due to 14 year dought much like the one in the 30's, and being over run by wild hogs and deer explosion.

gordon

Answer 2

well, you could breed once a year, and barring complications you would have 100 calves that year, plus what you already have, and breed all those and have 400 total, then 800, then 1600, then 3200.

But really, life isn't perfect. It is impossible to predict what your ratio of bull calves to heifer calves will be, when your breeding stock will "stick" and the quality of the livestock you are producing.

In my example, my family started with 2 cows about 8 years ago, and now we are up to 50, with buying a few here and there, selling, and with all the ups and downs of life.

Answer 3

Assuming 0% mortality, 100% conception rate, and 3 year-old cows to start with.  50% of calves are heiffers:

Year 1 - 100 cows.  50 heiffer calves.  

Year 2 - 100 cows.  50 1 year heiffers.  50 new heiffer calves.

Year 3 - 100 cows.  50 bred heiffers.  50 1 year heiffers.  50 new heiffer calves.

Year 4 - 150 cows.  50 bred heiffers.  50 1year heiffers.  75 new heiffer calves.

Year 5 - 200 cows.  50 bred heiffers.  75 1 year heiffers.  100 new heiffer calves.

This is an "all things being perfect" assumption: 250 breeders at five years.

Answer 4

The genetic bomb is supposed to hit . If it does you will have no cattle in five yrs.