Needs ideas for the reason for the different sizes for ninetailed foxes i Made up.
. The Korean kumiho is sexual dimorphic as the males are big as a coyote while the vixens are as big as a red fox, this species has adapted to a pack-hunting lifestyle but need a reason why.
. A siamese cat-sized species that climbs trees like the gray fox or the raccoon dog with sharp hooked claws but again need a reason why.
. And the others remain as big as red foxes.
Anyways need ideas on why these foxes are like this through evolution?