Board Thread:Questions and Answers/@comment-24577221-20141016181049/@comment-24577221-20141130195406

Here's a twist... In the mobile-device version of the game, the Breeding Structure's "Info" window also shows a "Time Remaining" display. When that counts down to 0:00:00, it continues into negative numbers: 0:00:-01, 0:00:-02, ..., 0:00:-59, 0:-01, 00:, 0:-01:-02, ... .

As soon as you close that window, you just get the usual "breeder's done!" balloon. There doesn't appear to be a way to spend -1 diamonds to get the breeder back up to 0:00:00.