Just how inbred are Glen of Imaal Terriers?

The above was one of the questions that came in when we asked, a couple of months ago, for things to make Glen of Imaal Terrier people think.

Glens have quite a limited gene pool and a history of very close inbreeding (like many breeds in all honesty) and this does increase the risk of inheriting genetic diseases but, so far, the breed has only seemingly got “one biggie” PRA and there is a solution to it. So is our limited gene pool a big a problem as everybody is forecasting or do the bar-sinisters in the breed really alter perceived perceptions and help to minimize the serious and detrimental effects of genetic bottlenecking which are the current buzz-words?