Who said "The trade in dead animals was a necessary economy"?

This quote is attributed to Squealer.

The trade in dead animals was a necessary economy - Squealer

"The trade in dead animals was a necessary economy"

Squealer Power

Character in Animal Farm

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"Some animals are more equal than others"

"Surely there is no one among you who wants to see Jones come back?"

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"Four legs good, two legs bad"

"Power without control is just destruction."

"Power is not about control, it's about influence"

"The world doesn't need me to be the hero. It just needs me to be dangerous."

"The claws come out when I need them to."