Well as the title says. I built one, but there is no option on the pets that says regenerate or  something like that.

But maybe I'm just dumb and don't see it. ^^'

seph, to use the Sanctuary, you need to go to the building itself through the Manor tab and select "Use" from the dropdown.

xD Okay since none of the other buildings worked through that I wasn't checking that option at all.

Thanks for the answer Angel.