
|Britney an 8 month old Dogue de Bordeaux and weighs in at just over 8 stone she started her first season, 2 weeks ago she, I would expect it to last another week to 10 days , but the keep her away from other dog's for another few days or so to make sure that she is clear.
The Tibetan Mastiffs I have only come in season once a year and did not have her first season untill she was 14 month's old, The Yorky and Tibetan Spaniel come in every 6 months regularly, they are both the same age and had there first season at 6 months. The Newfoundlands are not regular at all they fluctuate bwtween 5-6 months and last 30+ day, This seems to show that different bitch's have different cycles, and you have to watch and hope some pattern emerges.I think the book say 6 months for the first, season then every 6 months for then on.and the average season lasts 28 days, the peak time between 10 to 14 th day's being the most fertile. but I would say every bitch is different and you will learn from you bitch in time.