I've noticed that at different times my breeding tab (top left hand side of the screen) is blinking for no apparent reason. I click on it and it of course shows me the list of the current top sires, dams and breeding stables in the game, but I have no idea why it may be trying to draw my attention. I have my own breeding stable, which is a long way from where I'd like it to be, but it is coming along nicely and I'm comfortable that it's headed in the right direction. I'm just curious as to why it may be blinking like that, seemingly at random, any ideas?

As far as I can work out, it signals that a pairing that you made with one of your mares in the breeding barn is now completed (i.e. horse in foal). Quite useful if you have a large breeding operation as it serves as a reminder to sort out some more pairings. If an AI trainer buys the services of one of your stallions, the light again flashes once the horse has done what was expected of him.

Thanks Harry that explains it nicely