at Stud limited time. oil been checked. Sin city (patrickbolio) known for Intensity, fire, gameness, natural air, wrestling ability, decent mouth, very durable, extremely big heart, good head chest dogs. these sin city dogs are screamers very loud! just a natural athlete. Goo structure very balance and they cross well with almost any other line of dogs. even just a 1/4 of sin city blood will make a difference.