Are brindle coloured pugs rare

Brindle is the colour and BUlldog is the breed. Brindle means that each individual hair is made up of different colours, typically brown, tan and black rather than being one plain colour.

The Brindel Bulldog is a breed, - a type of Bulldog - u can read more about it on W.E.B.P.S (White English Bulldog Preservation Society)