I go by the rough rule of 30 day cycle, 10 days coming in 10 days standing 10 days going out.
So that’s the 10 days of bleeding then from day 1 to 10, then day 10 to 20 they will stand for a dog then day 20 to 30 they are still giving scent and attracting dogs but generally won’t stand.
thats just general rule. With little variation depending on the bitch