This ancient peasant working dog, the Portuguese Cattle Dog, is a devoted protector of master and family. Muscular, intelligent and brave, they are trustworthy companions and unyielding guard-dogs having Mastiff lineage crossed with other local dogs. The Hyena or Lycaon head resemblance, their progressive low growl to sharp prolonged barking, and agile wind-like running gait are uniquely distinctive. Its deep strong character requires experience and firm handling. Its coat color varies, but needs much grooming.

Also called Cao de Castro Laboreiro.