
Mine bleed all the way through too.
As you are going there so early(day 8?), I would consider getting a blood test done to know where she is at.
One of mine was madly flagging from day 8 and I think she would have happily allowed him to mate her(Tart).
We got there early as had 3 days travel so wanted to get there and then do first prog tests (as with £2000 travel costs I did not want to get there to find out we have missed the boat!).
However he would play and test mount but that was it.
After few days of this, even when you know she is probably not ready, you start thinking what about if he is not going to mate her for some reason???
Prog tests revealed she was nowhere near ready, ovulated in the end I think it was day 15 so if he had mated on day 8, it might have been too early to be successful.
Also, if he was to mate your girl tomorrow, would you keep trying until she says no more?
You might end up with a really big window of when the pups might be born which could be STRESSFUL and costly if you ended up in and out of vets...
This is another reason I test, to know when the pups are due. My breed seems to be pretty much on the dot of 62-63 days from ovulation :-)