The British Guernsey is slightly larger than the Golden Guernsey and is not easily distinguished from the parent breed.
An average 24 hours yield of 3.16 Kg. at 3.72% butterfat and 2.81% protein was obtained by considering data from all Golden Guernsey/British Guernsey goats entered in B.G.S. recognised milking trials in a recent year (272 performances). Very few of the samples were from British Guernsey goats.