Wow! "World of Ptavvs" was published in 1966!
"Bandersnatchi are enormous intelligent creatures, supposedly created as food animals, but were actually spies for their designers, the Tnuctipun, a highly intelligent slave species that led the revolt against the Thrintun. Only the Bandersnatchi survived the war, as they were specially designed to be immune to Thrintun mind control."
I.
Am.
NOT.
Going.
To.
Respond.
To.
THAT!
(LOL!)