Here's a relevant post from @Wodahseht:

Bold empahsis mine
https://e621.net/forum/show/191504

Genjar said:
I've suggested that a couple of times. But different artstyles make it a hard sell.
For example, would any of these be considered 'anatomically correct' feral foxes?

Wodahseht said:
I know. Defining and putting such into action would be tricky and I don't know how to really go about it. My point was mostly that we shouldn't be looking at removing the feral tag from those, but rather a tag that lets people sort out those specific ferals if that's what they're after.