The lack of a ridge is a birth defect. I owed two Rhodesian Ridgeback's, one male and one female. The male had no ridge and was larger then the normal breed standard but he was the only one in his litter without the ridge. The female was perfectly normal complete with papers. They were brother and sister. The lack of a ridge occurs on occasion but does not mean anything is wrong with the dog.
Answered by Anonymous - 12/12/2011 10:12:48 PM