Yes, a child in my child's Y7 class does this. That child is my child.
She doesn't wear a tail to school because I won't get one. But does do the walking on all fours, howling, licking arms, nose-twitching and sniffing etc - and always has done, this was one of the things that was noted on her autism diagnosis long before she or I had ever heard the word therian. She doesn't have internet access herself - she got the terminology from another autistic girl the same age, and it has spread across a group of them like the bubonic plague. I'm really worried about how vulnerable she is to older people for whom it is a sexual fetish. The walking on all fours is actually an occupational therapy exercise we were shown when she was still a pre-schooler and is beneficial to autistic kids with low muscle tone and in need of proprioceptive input. I have taken youtube off the apps on the TV (although she was never interested in it anyway), she won't be getting a smart phone, and I've had a million conversations with her about the difference between pretending and reality. I've asked for an early review of her EHCP to add in to it that while it's fine for her to pretend to be a wolf, it is bad for her SEMH to retreat into a complete fantasy world and staff are not to indulge it. I've spoken to the senco already and she's in agreement.
This means that like the Scottish report a PP referenced my child's EHCP will make reference to therians and her belief that she's a wolf along with outcomes (because that's how EHCPs work), and if the Mail get hold of it I'm sure they'll do the same hatchet job on "documents that we have seen" that insinuates the school are encouraging it.
Still, it's great to know that when other parents see her howling, or licking her arms, or sniffing and twitching her nose - all things she has done when dysregulated since she was tiny - what they are thinking is that
I am to blame (thanks @DaisyChain505)
she should be taken off me (thanks @Tattletwat)
I let her have unsupervised tiktok (thanks @Fluufer)
I support it and I'm fucking mental (thanks @DelilahRay)
And before you protest that that's unfair because you didn't mean ME, you meant the parents who are encouraging it - you can't tell from looking which child has the encouraging parents and which doesn't because their behaviours look identical. I can guarantee if you saw us when DD is dysregulated you would be hoiking your judgey pants up so hard you'd wedgie your tonsils.