Hi All, New to this forum my name is John and i have a ridgeback x. Mother is Great dane x ridgeback. Father is americian staffy. My puppy is 15 weeks old and looks like a pure ridgeback, Tan in colour amber eyes and long legs with long ridge down his back if you did not know he was a x breed you would think he was all pure ridgeback to look a him. And my question is how tall should my puppy get as x breeds don't grow at the same rate as pure dog breeds i was told. So any help would be great. PS my vet thought he was Pure. All the Best John.