Definitely ok -- orange is very sugary, it's basically like candy. I only feed it very occasionally. I tend to do primarily leafy greens like red and green leaf lettuce, endive, escarole, parsley, cilantro, etc, and a selection of bell peppers and then one of the leafies that are higher in calcium which they shouldn't have in such great quantities, like kale or bok choi.
We are as gods to the beasts of the fields. We order the time o' their birth and the time o' their death. Between times, we ha' a duty. - Terry Pratchett.
"Men have forgotten this truth", said the fox, "But you must not forget it. You become responsible, forever, for what you have tamed. - Antoine de Saint-Exupéry