I'd like to suggest some sort of automatic message that could be generated when a studding is accepted but does not occur for various reasons, in addition to the current Accepted/Rejected messages. I am imagining something like so:

Studding Accepted - Lioness Hungry
Studding Accepted - Lioness Mood Low
Studding Accepted - Need Den Space

So that way the burden is not always on the stud owner to communicate to people if their lioness or den needs attention for the studding to be accomplished.