The twins were born conjoined at the shoulder. Surgery shortly after birth successfully separated them, but their respective forelegs had to be amputated.
The surgery costs left their birth parents in tremendous financial debt, so they heartrendingly decided to give them up for adoption once they recovered from the surgery a few months later.
Both twins were adopted by Livestrong and Pathfinder 2 years following the tragic death of their only child, Surveyor.
The two twins are inseparably close, though Finch often gets a little too rough with his sister when they play, ending up with Wren in tears and Finch being scolded.