Sentence:  These so-called ‘<WSD>pig dogs</WSD>' chase after the wild pigs, often through rough terrain, and bring them down so that the following hunter can shoot the quarry. There is normally more than one dog involved in the hunt. The <WSD>pig dogs</WSD> tend to be powerful crossbreds with Great Dane, Bull Mastiff and/or Pit Bull Terrier blood and sometimes with a dash of Irish Wolfhound or Scottish Deerhound to give them more speed and height. 
Meaning of the word marked with <WSD> tags:  A dog bred to hunt wild pigs, typically based on breeds such as Staffordshire Terrier and English Bull Terrier.