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Assessing Weight

To calculate your horses weight you will need to measure (in inches):

  • The length of your horse from point of shoulder to point of buttocks.
  • The girth.

You will also need to asses your horses condition.Assessing your horses condition

To asses your horses condition accurately it is necessary to look at three places on the horse:

  1. rump, looked at from behind.
  2. back, saddle region and flanks below saddle.
  3. neck, base of neck, only just in front of withers.

and give a condition score from the table below:-

 
    rump back & ribs neck area
  Emaciated awaiting detail. awaiting detail. awaiting detail.
  Poor awaiting detail. awaiting detail. awaiting detail.
  Moderate Croup well defined but some fatty tissue felt under skin. Pelvis easily felt. Slight cavity under tail. Backbone just covered, individual processes not apparent but easily felt with pressure. Ribs just visible. Narrow but firm.
  Good Fatty tissue covering whole area giving rounded appearance without any gutter. Skin appears smooth but pelvis easily felt. Vertebrae well covered but no gutter. Backbone easily felt with pressure. ribs just covered. Firm. No crest except stallions.
  Fat Pelvis buried in soft fatty tissue, gutter to root of tail, pelvis felt only with firm pressure. Gutter along length of backbone ribs well covered by fatty tissue. Bone structure only felt with firm pressure. Wide and firm, with folds of fatty tissue present. Slight crest even in mares.
  Grossly Fat Pelvis buried in fatty tissue, deep gutter to root of tail, skin distended. No part of pelvis felt even with firm pressure. Deep gutter along length of backbone ribs buried in fatty tissue. Bone structure cannot be felt. Back more like a table. Very wide and firm, with folds of fatty tissue present. Marked crest even in mares

How the Horse weight is calculated

The program uses the following calculations:W=estimated weight (lbs) = G*G*L/y

WhereL
Length = point of shoulder to point of buttocks (inches)

G
Girth (inches)

y

  • 291.7 (thoroughbred stallions/colts)
  • 302.7 (thoroughbred mares/fillies)
  • 298.8 (thoroughbred geldings)
  • 290.9 (other mares/fillies)
  • 291.6 (other geldings)

adjust y according to the condition score as follows, to find the condition score see how to assess condition: 

  Condition Score
  0.5 add 30
  1 add 24
  1.5 add 18
  2 add 12
  2.5 add 6
  3 no adjustment
  3.5 subtract 6
  4 subtract 10
  4.5 subtract 12.4
  5 subtract 14
  You should score the pelvis, neck and back separately. Then if the neck OR back are 1 or more greater than the pelvis, add 0.5 to pelvis score; if either is less by 1 or more then subtract 0.5 from the pelvis score; if one is greater and the other less than the pelvis score, do not adjust the pelvis score.Then use just that resulting (adjusted) pelvis score to adjust the value of y.