Pietrain Origin: Belgium. Pietrain village. Type: Meat. Flavor: Very lean meat. Size: Medium toLarge. Color: White with Black or Gray Spots. Temperament: No reliable information can be found. Notes: Unique double-muscling, but the gene that causes this excessive muscle production also make the Pietrain susceptible to many health problems, most notably Porcine Stress Syndrome (causes sudden death with stress).