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Raccoons solve puzzles for the fun of it, new study finds
(science.ubc.ca)
This is normal in mammals and birds, they get dopamine spikes in antecipation as you train them, so that when you remove the reward, they still get the "fun" dopamine spikes.
A place for raccoons migrating from reddit.
We are allies with the kingdoms of the opossummms, batss, and the birbs.