Horse of a different colour
Horse of a different colour : Phrases
Unlike the subject at hand.
Bush and Blaire are both credible, but Bush is a horse of a different colour.
Horses are registered at birth and the registration includes a record of their colour. When a horse trades hands due to sale, the registration is also transferred. Sometimes the colour recorded on the registration may not match the actual colour of the horse leading one to suspect the horse is not the one in the registration.
Horses sometimes change colour as they age, just as some people's hair changes colour. More likely the horse is not the one represented on the registration but is actually an entirely different horse.
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