What's the word for someone who loves two entities, like bilingual is one who knows two languages?

Question

I saw the movie Isle of Dogs (2018) yesterday. The narrative described a kingdom of cat-loving humans waging war against the dog kingdom.¹ Later, some characters spoke only Japanese without subtitles or interpreters. Since I understand some Japanese, I got some Bilingual Bonus (warning: tvtropes). In real life, I am not a "cat-person" or a "dog-person", but a "both"-person.

So, all of this got me into world building mode. I started writing a story involving three kingdoms, the cat-lovers, the dog-lovers, and the "both"-lovers. This is where my question comes:

What's the word to describe a person who loves two entities?

I would like to form a sentence like below:

The cat-loving kingdom and the dog-loving kingdom have been at war for centuries, with the bi<what?> kingdom acting as the peacemaker to prevent a catastrophe.

so that it reads similar to:

The English kingdom and the French kingdom have been at war for centuries, with the bilingual kingdom acting as the peacemaker to prevent a catastrophe.

Obviously, I don't want to go with "bi-lover" (or similar) due to certain connotations.

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¹ It is from one of the earliest scenes and not particularly relevant to the plot, so not a spoiler.

Answer 1

Don't get too hung up on using the word "kingdom" There is no specific word in English so just describe:

... with lovers of both acting as peacemakers

... with neutrals acting as peacemakers

Answer 2

Cats and dogs are different species. So, in the spirit of bilingual (and bisexual), you could call lovers of both species "bispecials".

I thought this would be an invented word but then I found this word has already been used as a label in a similar context of two species.

Answer 3

The closest I can think of (which may not satisfy your specific requirement) is "the egalitarian kingdom."

From egalitarianism:

[Merriam-Webster]

1 : a belief in human equality especially with respect to social, political, and economic affairs
2 : a social philosophy advocating the removal of inequalities among people

Of course, replace people or humans with animals . . .

Answer 4

You need to invent the kingdom's name, it has to be easy to pronounce and it should contain references to both animals. So how about combing the words feline and hund? Feline refers to all members of the cat family while hund is an Old English word for dog

Felizerhund

(inspired by Switzerland)

Obviously, a kingdom that loves cats should be called Catland, while a dog-loving kingdom could be called Hundia or Houndlia