“Not many years ago, a ‘full book’ for a breeding stallion would consist of about 35 mares a season, spaced from the middle of February to the middle of June but concentrated in April and May. Now, with the demand for top-quality race horses so strong and the profits so great, some of the best stallions are being bred to as many as 60 or 70 mares a season.
‘When I see some sire with 40 or even 45 registered foals,’ said [Jack] Price [of Carry Back fame], ‘you have to wonder how the figures add up. I’ve never been that lucky.’”
(Steve Cady / The New York Times, 11/26/1978)