I'm a new Sulcata owner (40 lbs. 20 yrs old?) and was told they liked colored food. I really didn't think much of it until I brought out a bag of leftover red and yellow pepper strips and he practically trampled me in his frenzy to get to the bag (the bag wasn't opened so it was purely visual). I didn't even know a tortoise could show excitement; I have a lot to learn.