Which At breeds come in Elma kır?

Club breed standards describe Elma kır for the Percheron.

At pattern

Elma kır

Rings of darker hair around lighter centers over the body, as in dapple gray horses. The Dachshund's dapple is the merle pattern.

4 At breeds list Elma kır. It is in a club standard for 1 breed.

Breed	SHPF
Percheron	Standart (“gris fortement pommelé”)

How Elma kır can appear or change over an animal's life.