A group or collection of ferrets is called a "business"
You'll like this: it's called a 'business'. A business of ferrets!
I can just imagine them wearing little suits with those mischievous faces of theirs!
Bhagānā. {Google Translate}
Call the collection a harem.
Animal Control or 311, if California has 311 service
A comic's collection of humorous materials is referred to as a 'repertoire' .
Cutlery.
Genotype
schools
anthology
bunch
buch
Scones
baby ferrets are called kits because of the simularities to feline kits, but some people call them "pups"