The dog in stable phrase has cropped up before on AB
// my racist alcoholic granny who says things like "Just because a dog is born in a stable doesn't make it a horse" when referring to people of Asian descent who are born in Britain. I certainly couldn't listen rationally to anyone who argued those points. //
http://www.theanswerbank.co.uk/News/Question429465.html
// But because they were born here doesn't make them British.
A dog can be born in a stable but it doesn't make it a horse. //
http://www.theanswerbank.co.uk/News/Question768482-2.html
New Judge
// As an admittedly very racist comedian once quipped, “Just because a dog is born in a stable, it does not make him a horse”. He said it to get a cheap laugh, but I think he had a point. //
http://www.theanswerbank.co.uk/News/Question1079471.html