Are Elves vegatarian?

[Tuor in Gondolin]

Legolas seems to have had no trouble eating meat. From LoTR "Flotsam And Jetsom":

"And you need not turn up your nose at the provender, Master Gimli," said Merry. "This is not orc-stuff, but man-food, as Treebeard calls it.Will you have wine or beer? There's a barrel inside there - very passable.And this is first-rate salted pork. Or I can cut you some rashers of bacon and broil them, if you like. I am sorry there is no green stuff: the deliveries have been rather interrupted in the last few days!"...
The three [Aragorn, Legolas, and Gimli] were soon busy with their meal [no hint that legolas didn't munch on the pork or bacon