Eye Colors of the Nigerian Dwarf
Blue eyes are a dominant gene, meaning a goat must have blue eyes to produce blue eyed kids.
Blue eyes do not skip a generation. Two brown-eyed goats bred together cannot produce blue-eyed kids.
A blue eyed goat can be homozygous for blue eyes, meaning it will only produce blue eyed offspring regardless of it's mate. A homozygous blue eyed goat will have blue eyed parents and have received a copy of the blue eyed gene from each parent.
In very rare cases there have been several reports of a Nigerian Dwarf having one blue eye and one brown eye. It's extremely rare.
Bl Bl - Homozygous blue eyed. Is blue eyed and will always produce blue eyed kids, regardless of mate.
Bl bl - Heterozygous blue eyed. Is blue eyed, but carries the brown eyed gene.
bl bl - Brown eyed. Does not carry the blue eyed gene and will never produce a blue eyed offspring unless bred to a blue eyed mate.
The chart below shows possible matings between blue eyed and brown eyed goats and the possibilities of their offspring's eye color(s).