Age related colour changes

[Malakai10]

So, I was inspired by a mixture of this topic, ADHD and insomnia to record age related changes in coat colour. This will likely take a long time to complete as it's more of a side project.

Helpful/important links:

Horse colours: Names and pictures by Totina
What Colour is My Horse? Quick Guide by Ancient Breed by Argent
Shades of Black by Nazarach
A Study in Dilution: the Dun Gene by BlackOak2
A Study in Dappling: the Silver Gene by BlackOak2
Horse Colour Genetics: An Introduction

These links will also have been used as a reference.

Note: in this topic, 'dilutions' will refer to dun, cream, pearl, champagne and silver.

[Malakai10]

Chestnut, Flaxen and Dilutions
Base:

Flaxen:

Champagne:

Cream:

Double Cream:

Dun:
0 years: notice how non-grey foals appear mealy (lighter area around eyes, muzzle, belly and legs.) Note how the mane, tail, tip of the years and top of the back are a bright, red colour and how the body is significantly lighter, but still darker than the mealy areas. This is an indication of red dun. The colt is also tiger eyed, hence the light eyes.

1,13 years: the mealy areas have darkened to the same red as the mane and tail. The body has also darkened, but only slightly. The body colour change seems to be more of an increase in colour saturation. The body has also gotten shinier, due to the training the horse has been in (note that the increase in shininess is due solely to training - it is not age related.) Note the dark patches on the neck and hindquarters. All red areas have darkened slightly.

3 years: rate of colour change has slowed down. There is only a subtle change between the ages of 1,13 and 3. Notice how the grey patches have darkened.

Notice the faint striping on the right ear. Also note that the face is nowhere near as shiny as the body - this indicates that the horse is not metallic.


Pearl:

Silver:

• Silver requires at least one extension (black) gene in order to appear; as such, it does not appear on chestnut (although it may be interesting to conduct a study to see if there are in commonalities in chestnut silver carriers.)

Combinations:

[Malakai10]

Black and Dilutions
Base:

Champagne:

Cream:

Double Cream:

Dun:

Pearl:

Silver:

Combinations:

[Malakai10]

Agouti and Dilutions
Base:

Champagne:

Cream:

Double Cream:

Dun:

Pearl:

Silver:

Combinations:

[Malakai10]

Pangaré (Mealy), Sooty, Tiger Eye, Metallic
Metallic:

• So far, has not been shown to express any age-related colour change.

Pangaré:
Sooty:
Tiger Eye:

• Does not cause colour change. It should be noted, however, that two copies of the gene are required in order for the colour to be expressed - with the exception of champagne, which requires one copy. Champagne foals may be mistakenly thought to be tiger eyed due to having blue eyes at birth - however, this is a characteristic of champagne and the eyes will darken as the foal ages.

[Malakai10]

Roan
Chestnut:
Extension:
Agouti:
In Combination:

[Malakai10]

Tobiano
Chestnut:
Extension:
Agouti:
In Combination:

[Malakai10]

Grey
Grey foals are born the colour that the horse would be as an adult, were it not grey. The exception with this is sooty - sooty is not expressed on grey foals, or, if it is, is expressed minimally.

Most, if not all, greys become fleabitten; the age at which the become fleabitten is determined by genetics. A horse will normally be fully greyed out before fleabites begin to appear. The contrast of fleabites (size and colour) to the grey of the coat can also vary. Occasionally, one will find a horse that obtains fleabites before it has fully greyed out or a horse that never obtains fleabites.

[Malakai10]

Spotted

[Malakai10]

Horses used:

• Chestnut, Flaxen and Dilutions
  • Base:
    • http://www.horseworldonline.net/horse/profile/2150502
      http://www.horseworldonline.net/horse/profile/2155418
      http://www.horseworldonline.net/horse/profile/2173832
      http://www.horseworldonline.net/horse/profile/2173831
    Flaxen:
    
    Champagne:
    
    Cream:
    
    Double Cream:
    Dun:
    • http://www.horseworldonline.net/horse/profile/2131207
      http://www.horseworldonline.net/horse/profile/2155473
    Pearl:
    
    Silver:
    
    Combinations:
    • http://www.horseworldonline.net/horse/profile/2110449 (gold dun)
      http://www.horseworldonline.net/horse/profile/2131261 (Gold Dun)
  Black and Dilutions
  
  • Base:
    
    Champagne:
    
    Cream:
    
    Double Cream:
    
    Dun:
    
    Pearl:
    
    Silver:
    
    Combinations:
  Agouti and Dilutions
  
  • (Seal Brown)
    Base:
    
    Champagne:
    
    Cream:
    
    Double Cream:
    
    Dun:
    
    Pearl:
    
    Silver:
    
    Combinations:
    • http://www.horseworldonline.net/horse/profile/2155457 (Ch+Cr)
  • (Bay & Wild Bay)
    Base:
    
    Champagne:
    
    Cream:
    
    Double Cream:
    
    Dun:
    
    Pearl:
    
    Silver:
    
    Combinations:
    • http://www.horseworldonline.net/horse/profile/2163399(TG dunskin; very faint markings)
  Metallic:
  
  Pangaré:
  
  Sooty:
  
  Tiger Eye:
  
  Roan:
  
  • Chestnut:
    
    Extension:
    
    Agouti:
    
    In Combination:
  Tobiano
  
  • Chestnut:
    
    Extension:
    
    Agouti:
    
    In Combination:
  Grey
  • http://www.horseworldonline.net/horse/profile/2077459
    http://www.horseworldonline.net/horse/profile/2131225
    http://www.horseworldonline.net/horse/profile/2110471
    http://www.horseworldonline.net/horse/profile/2110486
    http://www.horseworldonline.net/horse/profile/2052190
    http://www.horseworldonline.net/horse/profile/2107210
    http://www.horseworldonline.net/horse/profile/2077459
    http://www.horseworldonline.net/horse/profile/2107212
    http://www.horseworldonline.net/horse/profile/2131210
    http://www.horseworldonline.net/horse/profile/2131201
    http://www.horseworldonline.net/horse/profile/2110439
    http://www.horseworldonline.net/horse/profile/2131204
    http://www.horseworldonline.net/horse/profile/2131205
    http://www.horseworldonline.net/horse/profile/2131265
    http://www.horseworldonline.net/horse/profile/2110456
    http://www.horseworldonline.net/horse/profile/2143270
    http://www.horseworldonline.net/horse/profile/2110438
    http://www.horseworldonline.net/horse/profile/2225797 (grey on sable cream)
    http://www.horseworldonline.net/horse/profile/2224633
  Spotted