
It will depend on how regularly spaced her other seasons have been before she was bred from - i.e. was she like clockwork every 6, 9, 12 months for example? Bitches can vary the dates by a few weeks after a litter but her previous body clock is the best thing to go by. If you're still concerned, contact her breeder and seek advice if there is a specific pattern in her bitch line post welping.
regards, Teri :)