The RH had a too short a run, I think, but Spector cheated his artists of royalties and Verve, if I'm not mistaken, by then owned by MGM and a young Mike Curb who was stealing other labels' artists, left and right with million dollar advances, didn't give them enough support. Around the same time Roy Orbison, Herman's Hermits and the Animals all died on MGM Records.
Incidentally, Spector was incredibly bitter about their departure and a few years later claimed in a rare interview that these guys had no talent and he was the one who made them. Funny, it seemed right at the time as they were now has beens, but the truth seems to me is that like many artists they only needed good material and a good producer. Rock and Roll Heaven proved it!
The Animals (the original group, not the later psychedelic version) was my favorite band of that era. As big as they were, they could have been huge if not for corrupt management and bloated egos (mainly Burdon and Price) that destroyed the band before its time. Recently sent an email to guitarist Hilton Valentine's website, and received a cordial reply. Made my day.