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Cornish Cross sexual maturity and can they breed? - Page 6

post #51 of 56

they can and will mature and mate and they can and will lay eggs and they can and wqill hatch the eggs and the chicks will be like the adults but not as fast growers roosters may not mature due to weight they have there reproductive orgens get crushed and constricted so try to liment the feed to keep the weight low on your breeders.

buff orpingtons, white leghorns, and barred rocks odd mix but whos to say whats normal?
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buff orpingtons, white leghorns, and barred rocks odd mix but whos to say whats normal?
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post #52 of 56
Quote:
Originally Posted by VeganChick 

Hello... My Liz is a Jumbo Cornish Cross - and is 10 months old... She's huge!  Of course, since I don't consume any animal products I'd never, ever consider her a meal... But am wondering what is her life expectancy?  Does anyone know what "the record" is?  She's about the sweetiest bird there ever was... loves attention and petting.  I can't imagine not having her around. sad


My oldest CX are just past 10 months. The cockeral has never produced a chick; but with spring approaching, has renewed his efforts and improoved his technique [ he now staddles the smaller hens, keeping both feet on the ground] and I'm guardedly optimistic about getting some crosses from him.

The pullets have produced several crosses from Ameraucana males; the chicks are more than twice the size of Ameraucanas.

They should be kept on restricted diets to insure breedability, and its a hassle trying to keep them from gaining too much weight while feeding the other breeds enough. I've not done CX to CX matings; it just isn't worth the time, money, and trouble to me to try and produce another CX with the same inherent problems and probable lower efficiencies for feeding to process weights. 

A couple of threads where some have used the CX to breed:
http://www.backyardchickens.com/forum/viewtopic.php?id=316007&p=1
http://www.backyardchickens.com/forum/viewtopic.php?id=301996&p=1

post #53 of 56

I bought 8 of them this Spring.  I have 4 left, 3 hens and 1 rooter.  Sice last week, the rooter has legs problem.  He could not walk anymore.  I saw my Rhode Island red jumped on my crnish  hens.  Let see what come out.

post #54 of 56

My suggestion,

 

Breed a Cornish X with a large slower breed e.g. ( White Jersey Giant, White Rock, White Brahma) The rapid growing genes will still have an influence, but with the slower growing genes of another will give a pretty good free range bird that can grow at a decent pace. It will have to be ready to be processed in 9-12 weeks, any longer than that and its not cost effective. I would go with a White Jersey Giant Rooster and Cornish X females to keep the big breast in the genes, the Jersey Giant should have better movement to mount the Cornish X Females.

 

But I agree with people on here you have to not feed them much, keep them as skinny as possible to allow better growth and movement. I would try feeding them just plane chicken scratch  I believe most of the chicken scartch in the market are around 7% protien and throw in a good mixture of calcium to get stronger and healthier eggs.


Edited by csr326 - 12/25/12 at 11:29pm
post #55 of 56

We had 25 cornish x rocks.  The "Exotic Bird" they sent along with the 25 chick is a Dark Cornish. He remained so small in comparison that we called him Pip — short for Pipsqueak.

 

At 9½ weeks I couldn't take watching the crosses struggle to stand for more than a few minutes (or seconds) and walk a few steps and then plop themselves back down only to defecate where they lay.  9-and-one-half-weeks!

 

I brought them over to our local processor and had them slaughtered.  They all dressed out in the 8-10 lb range.  The taste is indeed excellent.  But I can still see engineered food so American can get cheap meat.

 

These birds were not built for breeding — period.  As with any hybrid, plant or animal, you will never get the same result from progeny of a hybrid.  For the price of Cornish x Rocks chicks (anywhere from $1 to $2 each), it's simply more humane to buy new ones.  (That's a word I haven't seen in this thread but I haven't ready every post.)

 

Pip is now taller than all but our Buff Brahmas.  He's also remarkably friendly.  We will be setting him and our White Rocks out in a separate coop this Spring to see what results we get.  Dark Cornish (or any Cornish male) x White Rock is pretty close to the cross we're talking about.  We'll see what happens to what I would expect to be gorgeous birds.  We'll let them live a somewhat normal life and do without so much engineered food.

 

I can live with that.  Raising more Cornish x Rocks no.  I have a conscience.  I want animals that aren't a distortion of nature just to provide the maximum meat for Americans who pay more for potatoes chips than chicken.  I will treat the new progengy humanely and give them dignity because they provide us sustenance.

post #56 of 56

I've heard people claim that cornish/rock x are not true hybrids because by their definition, a hybrid is a cross of two separate species.  Truth be told, cornish and plymouth rock do have different parental lineage; cornish, and just about all other oriental game chickens, have more Saipan jungle fowl mixed in, whereas plymouth rock have more red and grey jungle fowl genes.  Another hybrid trait, is that they do not breed true, like a pure breed would.  To breed a CRX to another CRX would result in a wide variety of offspring; Some large and fast growing, some small, some slow growing, some big, but bony, some compact and meaty.  You would get more consistent results if you were to breed a CRX to a good pure bred dual purpose bird.  According to wikipedia a hybrid is:

Etymology

According to the Oxford English Dictionary, the word is derived from Latin hybrida, meaning the "offspring of an tame sow and a wild boar", "child of a freeman and slave", etc.[4] The term entered into popular use in English in the 19th century, though examples of its use have been found from the early 17th century.[5]

[edit]Types of hybrids

Depending on the parents, there are a number of different types of hybrids;[6]

  • Single cross hybrids — result from the cross between two true breeding organisms and produces an F1 generation called an F1 hybrid (F1 is short for Filial 1, meaning "first offspring"). The cross between two different homozygous lines produces an F1 hybrid that is heterozygous; having two alleles, one contributed by each parent and typically one is dominant and the other recessive. The F1 generation is alsophenotypically homogeneous, producing offspring that are all similar to each other.
  • Double cross hybrids — result from the cross between two different F1 hybrids.[7]
  • Three-way cross hybrids — result from the cross between one parent that is an F1 hybrid and the other is from an inbred line.[8]
  • Triple cross hybrids — result from the crossing of two different three-way cross hybrids.
  • Population hybrids — result from the crossing of plants or animals in a population with another population. These include crosses between organisms such as interspecific hybrids or crosses between different races.
  • Hybrid species - results from hybrid populations evolving reproductive barriers against their parent species through hybrid speciation.[9]

 

 

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