Horse Colour/Genetics Experts

so, my lovely B has a lovely but odd colouring (as if he isn't odd already, lol)

He's registered as 'bay' but I've heard him called 'dark bay'. Recently had someone say he looked chocolate dun.

He goes near black in winter, and can lighten up a LOT in summer. 

Even when he's at his darkest, he still has very yellow/silvery points. As he sheds his winter coat, his summer coat seems to come through very yellow at first, and ends up dappling. He gets very very light parts under his armpits/inside his back legs and on his muzzle, as well as at the top of his feather. He has zebra stripes/counter shading noticeably in his back legs.

I have seen dark browns and dark bays, and he is much more 'yellow' than them around his muzzle and in his lighter points.

if it helps, he has no recorded breeding. he definitely has trotter in him, and possibly Welsh Cob/Section D, Friesian or Connemara, but that's only going by what he looks like - he could literally be anything so anything is genetically possible

winter coat

forgive the fact he's bucking, lol, it shows off his lighter belly

summer

anyone have any ideas? I'm no good with genetics/how genetics present.

Im thinkin your boy is  EE Ata CCr StySty

A dark sooty buckskin

My first mare was registered as sooty buckskin. She would change colour with the seasons and go a darker chocolate brownish colour in the summer and in the winter her coat would much lighter...almost a yellow...

I honestly think he's a sooty buckskin.. ( also based on the ligher nose)

My only pics left of her are old and poor quality...but to show the changes in her coat....

*** she's very thin in the one pic cuz when I bought her she was abused..Malnourished and had been tied to a stake by her back left ankle, resulting in deep rope burn across the back of her pastern.. Her recovery was amazing..she was unrecognizable a year later and became an amazing barrel horse...

Here's my Distant Thunder

Summer of 1982 when I brought her home...poor thing so thin...coat is darker here



She's in the background here...again ..darker chocolate coat



September/October




November
Look how light she is now...I love the dapples!