This is what the the dog food project ( www.dogfoodproject.com/index.php?page=myths
) has to say:
Pork should not be fed because it causes pancreatitis in dogs
A statement I have encountered quite often recently, unlike any material that substantiates the claim. According to veterinary literature, the most common causes for pancreatitis are
*a high fat, low protein diet
*trauma (car accidents, falling)
*other diseases (Cushing's syndrome, diabetes)
*some drugs and toxins (e.g. antibiotics, insecticides)
*genetic predisposition (hyperlipidemia, e.g. mini schnauzer, cocker spaniel)
As part of a well balanced diet, pork isn't any more dangerous than beef, lamb or chicken. The fat content is key, and many pets suffer from pancreatitis when fed excessively fatty, greasy table scraps - which are not part of a balanced diet. The most susceptible animals are those who don't eat anything but kibble all year and suddenly get an overload of "goodies" on thanksgiving or other holidays.
One other thing that doesn't quite fit the bill is the fact that there is a good number of premium quality dog foods that use pork meal as a protein source. I very much doubt that a single manufacturer out there would risk their excellent reputation by purposefully including an ingredient in their food that is a proven cause of pancreatitis.