I think Donald and his friends are allowed to eat animal meat because they are a higher form of animal.
Then it means Goofy are allowed to eat Pluto?
'Cause here in my country there are some people who eats dogs too.
Very few, but they exist.
Actually animals eat other animal too,
higher forms or nots,
but usually not from same species.
"Usually" though, because there are few exception
like
coital cannibalism of Praying Mantis.