Using a fish on an ocelot causes it to enter breeding mode. (Using additional fish causes the number of fish in the player's hand to appear to decrease, but clicking on the relevant inventory slot fish causes the lost fish to reappear.) When two ocelots enter breeding mode, they continue to flee from the player, but will breed if the player hides out of sight.

After breeding, the parents and child will continue to flee from the player, and may despawn. The "Trusting" NBT is never set from 0b to 1b. Manually setting the tag using commands causes the ocelots to stop fleeing and become persistent, as expected.