Collie (Rough)

From Dog

The rough Collie is an English herding dog.

The breed stands between 51 - 61cm (20-24in) and weighs between 18 - 29.5kg. There are three main colours: sable and white, tri-colour (predominantly black and white with tan markings about the head and legs) and blue merle (clear silvery blue splashed with marbled black and tan markings).

The merle gene is a dominant, colour dilution gene and is responsible for defects and deaths if paired with another merle gene. Breeding merle to merle will have a lethal result for one quarter of the litter. Breeding merle to full colour will produce half merle and half full-coloured litters. Under no circumstances should merle dogs be bred with each other.

Disease predisposition

References