Originally Posted by DoubleTrouble

No your not stupid, I could tell you something that really was stupid that I rang the vet about once!!!! thats a long story and one that would have me laughed of the forum for sure!!

No, female dogs do this, but 13 weeks seems a bit young, I would have expected it to begin in the adolesent stage, but sure someone will come along and say theere's no age limit.
regards
DT