adjective 'animal' as a predicative complement

listeneverIt seems that the word 'animal' here is used as an adjective. But can the adjective 'animal' be used as a predicative complement as here?

Yes. Both adjectives and nouns can be predicate complements after a linking verb.

CJ

But these dictionaries say the adjective cannot be used predicatively.
http://www.oxfordlearnersdictionaries.com/definition/english/animal_2

http://learnersdictionary.com/definition/a

listenevercannot be used predicatively ... Are they all wrong?

The second link gives the example (second definition) Their attraction was animal .... That's "animal" used predicatively.

In the sentence you quoted you have the evidence before your own eyes that two of those links are wrong, strictly speaking.

CalifJimThe second link gives the example (second definition) Their attraction was animal .... That's "animal" used predicatively.

Thanks, CJ.
You're right about the second link.
According to which, 'animal' can be used predicatively only when it means "#2 of or relating to the body and not to the mind", but not when it means "#1 a : of or relating to

listeneverDo you agree?

No, because the quote from the clip clearly means "relating to animals", and it's used predicatively there. As I said earlier, dictionaries don't explain every use of every word in the language. And we can't expect them to, either.

CalifJimAs I said earlier, dictionaries don't explain every use of every word in the language.

If you consult the unabridged Oxford English Dictionary, you will likely find it.
All other dictionaries have to make choices about what to include, and what to leave out.

In the world of Zootopia, humans never happened, which makes Zootopia a

AlpheccaStarsnot scientifically accurate

Hmm. You didn't really think an ad about cartoon characters was going to be scientifically accurate, did you?

CalifJimIt seems to me then that the problem of the inaccuracy of "entirely animal" would be the presence of plants in the film,

If there were no plants in the film, then it would be about a carnivorous animal world. (Of course my posts in this thread have been poking fun...)

We, humans, belong to the animal world. We eat, breath, drink, procreate, perceive surroundings, eventually die as other animals. We are animal. (As Plato said: 'humans are featherless bipeds'.)