The organization also says people should stop saying "kill two birds with one stone," and say "feed two birds with one scone" instead.
"While these phrases may seem harmless, they carry meaning and can send mixed signals to students about the relationship between humans and animals and can normalize abuse," the group wrote on its website.
This is not the first time PETA has made a statement about animals.
Months ago, the group announced it would erect a billboard on a New Mexico interstate where four cows were killed after a semi hauling the animals rolled over.
Before that, activists wanted to put a 5-foot memorial along Route 1 in Brunswick, Maine after lobsters were killed when a truck carrying 70 crates of the live crustaceans overturned.
And over the summer, PETA targeted seafood lovers in Maryland, putting up a billboard of a crab with the caption, "I'm me, not meat" during the Baltimore Seafood Festival.