Yields

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pschloss
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Yields

Postby pschloss » Thu Oct 31, 2013 7:03 am

I'm starting to regret buying a scale to tell me what my live weights are because I'm realizing that the hanging weight yield on our all grass Polypays is pretty abysmal (~33%). I was wondering whether anyone can share their data on hanging to live weight ratios - my impression from reading around is that it should be 50%. I have a few ideas for the discrepancy, but am not sure what is the most likely cause here. Perhaps I'm getting hosed by our processors. I've had similar ratios at two different processors so I don't *think* I'm getting hosed. Perhaps the "standard" yield numbers are based on a different type of animal. How much would you expect a rumen full of grass and 6 months worth of wool to cause our yields to differ from 50%? Alternatively, does yield vary by age and weight? When we take in cull ewes that have recovered from mastitis we generally get 45% of their live weights.

Then again, maybe the 50% number is just wrong...

Thanks,
Pat
Pat Schloss
Eight Kids Farm
Dexter, MI
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woolpuller
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Re: Yields

Postby woolpuller » Thu Oct 31, 2013 7:19 am

Can have a lot to do with breeds
high performance, high health, high biosecurity, a truly closed Suffolk Flock

Polypays4U
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Re: Yields

Postby Polypays4U » Thu Oct 31, 2013 12:29 pm

The Polypay lambs we've had slaughtered off of pasture have had a dressed weight of over 50%. This is lambs for our own use as we have no info on lambs sold through sale barn.
Bill Hardman
Uncompahgre Polypay Farm
Delta, Colorado
The western home of productive Polypays.

pschloss
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Re: Yields

Postby pschloss » Thu Oct 31, 2013 12:38 pm

Bill - do you recall how old they were or how much they weighed?
Pat Schloss
Eight Kids Farm
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Bill Fosher
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Re: Yields

Postby Bill Fosher » Thu Oct 31, 2013 12:57 pm

Things that will have an effect on KO percentage:

Hot weight versus cold
If cold, the length of aging will have an impact, especially on lean animals
Head on versus head off
Organs in versus organs out
Amount of wool on the live animal, plus how dirty or clean, wet or dry the wool is when live weight is captured
Length of time standing before weighing (weighing full versus empty)
Length of time standing at the plant (some fat will be burned, and the animals may become dehydrated, reducing the weight of the carcass
Breed/conformation -- a more muscled sheep will have a higher KO weight than a framey or maternal sheep.

Still, even if everything were on the wrong side of where you want it to be, I still would have a hard time believing that it could go as low as 33 percent of live weight. I would tend to suspect a problem with the scale at your farm. Can you calibrate it with a known weight that is approximately the weight of one of the lambs you're marketing?
Bill Fosher
Westmoreland, NH

Darroll Grant
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Re: Yields

Postby Darroll Grant » Thu Oct 31, 2013 7:11 pm

Check scale with 2 50# sacks of feed or 3 if that is closer to the lamb weights.
Darroll Grant
western Oregon

Ebenezer
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Re: Yields

Postby Ebenezer » Fri Nov 01, 2013 5:51 am

pschloss wrote:Bill - do you recall how old they were or how much they weighed?

From our experience, I'd say that the age of a hair sheep lamb will be a bigger factor on yield than in wool sheep (no wooly experience) for HCW/LW. Too young and the yield will not be there.

Lana Rowley
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Re: Yields

Postby Lana Rowley » Fri Nov 01, 2013 6:54 am

We have been getting yield info back for the past 6 years or so from 2 sources where we sell lambs.

When we sell 48-52% yield is considered average and that is for a 45 and down carcass and finished forage 8 month old lambs 120-125lbs. The growers at Niman also get the weight sheets back on the other growers and the 48-52% is the norm.

What did your lambs weigh average on your scale? What is the protocol where you sold them as to cold or hot weights? Did they also give you a total lbs live weight?
Lana Mockler Rowley
10-7 Ranch
Oregon

Polypays4U
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Re: Yields

Postby Polypays4U » Fri Nov 01, 2013 9:52 am

Pat, I don't have the amount of data as some responders as I'm going by the kill sheet provided by our processor on lambs for our own use. They provide a live weight, hanging weight and % yield. I assume the hanging weight is right after slaughter but I don't know for sure. Lambs were 8 months to over a year and weighed 110 to 160 lbs.

My scales seem to weigh a little heavier than our local sale yard scales.
Bill Hardman
Uncompahgre Polypay Farm
Delta, Colorado
The western home of productive Polypays.

pschloss
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Re: Yields

Postby pschloss » Fri Nov 01, 2013 1:03 pm

Thanks everyone, I think we need to re-assess our home scale...
Pat Schloss
Eight Kids Farm
Dexter, MI
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Janet McNally
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Re: Yields

Postby Janet McNally » Fri Nov 01, 2013 1:27 pm

pschloss wrote:Thanks everyone, I think we need to re-assess our home scale...


I would agree on this. 33% just does not seem possible.

Janet
Janet McNally
Tamarack Prolific and Ile de France crosses
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Darroll Grant
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Re: Yields

Postby Darroll Grant » Fri Nov 01, 2013 1:44 pm

I have frequently checked an Aussie auction web site for sheep prices. Estimated live weight and dressed weight are given for each lot. I have seen 33% DP on some lots but they were older ewes. After my inquiry an Aussie friend added that they were heavy wooled and from droughty country.
Darroll Grant

western Oregon


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