The human eye discerns flickering movement at a rate of 50/60 Hz while in dogs, that same ‘flicker fusion rate’ is as high as 70/80 Hz.

Older television sets with a CRT screen refreshed their picture at a rate of 50/60 Hz with the result of a smooth picture for humans and a flicker nightmare for dogs. New LCD technology however, has changed all that. The refresh rate on the newer television screens is now 100Hz and up, perfect for continuous canine viewing