He'd probably lost count of the foals he had delivered.
With all the foals born on your place, is this the first time you have been able to watch?
So far, she hadn't been there to witness any of her foals being born yet.
A chestnut mare, after having a hybrid by a quagga, produced to a black Arabian horse three foals showing a number of stripes - in one more stripes were present than in the quagga hybrid.
To account for the stripes on the subsequent foals, it is only necessary (now that the principles of cross-breeding are better understood) to assume that in the cross-bred chestnut mare there lay latent the characteristics of the Kattiawar or other Indian breeds, in which stripes commonly occur.