Plural Propriety - Lincoln Park Zoo Poem by Ima Ryma

What's the plural of dwarf mongoose?
Inquiring minds do need to know.
Mongooses rates most proper use,
Though mongeese too is good to go.
Here at home in Lincoln Park Zoo
There's a dwarf mongoose colony,
Thinking humans make much ado
About calling them properly.
When the humans have this debate
Each dwarf mongoose just tunes them out,
And goes into a dreamlike state,
Dreaming of better things no doubt.

What to call a dwarf mongoose bunch?
Just call them when it's time for lunch.