Ok..so my party got knocked out and I wanted to use the "Revive Pets" selection in my stable.
However both options for revival are greyed out.
The stable claims I do not have any pets that require reviving yet clearly the first three pets in my stable need it. Why is that?

Does this have anything to do with a stable hand being employed currently?

Never mind. I just discovered I have to remove them from my party first. Sorry for bothering everyone.