Which ウマ breeds come in 連銭?

Club breed standards describe 連銭 for the ペルシュロン.

ウマ pattern

連銭

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

4 ウマ breeds list 連銭. It is in a club standard for 1 breeds.

Breed	SHPF
ペルシュロン	スタンダード (“gris fortement pommelé”)

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