Early in 2015 we rigged a fully anatomically accurate T. Rex for the National Geographic Channel's 'T. Rex Autopsy' documentary. The brief was to keep the musculature lean, so particular care was taken to bias the flexing of the muscles against the secondary jiggle.
Below: a breakdown of the T. Rex rig built using our in-house toolset at Flex Animation. Credit to Jonathan Symmonds for the source walkcycle for this breakdown.