He should've become a vegetarian sooner. And no, I'm not pushing the lifestyle. He, specifically, should've become a vegetarian after finding out that he can accidentally make watermelons sentient by spitting out their seeds. Because the last thing anyone needs is for him to throw out some chicken bones and see some poultry abominations.

There's a difference between bones and seeds.
Seeds are, well, seeds that can have capacity to grow into a watermelon.
A bone is a bone.
Now, if Steven were to lick a chicken egg, then we'd have Chicken Stevens running about.