Just a question, will the TFs in GMH be full feral with mental change?

Afaik, it has to be anthro stage 3 with half mental change. By the rules of GMH, the more your age the more you be animal. Of course, each rule has it's exceptions.

Of course, I'd prefer feral without mental change. But the story has it's own logic. For example, the boy could *think* he is a wild animal and run into a forest although he is mostly human and his mental capabilities are intact.

As Inry said, the older someone is, the more feral they tend to become. Mid-teens to early 20s is the crossing over point from traditional meme to anthro to full feral. There is some wiggle room, however; you don't just turn 20 and then suddenly are on all fours. Much like chicken pox, it's simply a risk associated with age as opposed to a hard and fast rule.

As far as mental changes go, there have been some undocumented reports, but nothing substantial as of yet. I suppose it's dependent on how you interpret the actions of someone who can no longer speak or emote like a regular human, and if you think those actions are more influenced by the physical form than any forced mental shifts.

So, it would be lv 4.5 or even more? Very good idea!

And you have to do a lot of research to find actual manual dexterety and vocal capabilities of a fox. It's too easy just write "his hands changed into paws" instead of "he felt his fingers in a thick glove and they refuse to move separately but he pressed the button with the claw of his middle finger". The same about voice, it is combination of physiological, neurological and mental capabilities that dogs can't speak like parrots (some dogs can say some words in RL).

Wait, this is a fox tf? Wow, when I went over the part with his dreams of ripping flesh I instantly thought 'wolf'!
Too many movies, I guess.

I just guessed. This could be anything, from squirrel to dolphin. The author likes to do twists.

I wonder if there'd be foundation or something for darkened noses or lips in this world.

One of my favorite things is theorycrafting world building. I love slice of life, if you couldn't tell, and make-up solutions for things like darkened noses, lips, hands, etc has occurred to me. Additionally, just today I was thinking of what kind of legal requirements there might be for access to things like buildings; do you need ramps not just for wheelchairs, but also for people on all fours? What about computer and terminal access for paws or hooves?

One of the things I'm excited to do is keep digging into this world and flesh out how things would work.

The best part is, you get to skip most of the tedious legislation involved with changing the infrastructure and get right to showing the implementation. From what I can tell, GMH has existed in your world for at least 15 years, right? Early teenage recipients are now practicing doctors, (Ann and Brian) and preteen recipients are now parents with preteens of their own, (Matthew's mom).

Anyway, you've already given a couple of glimpses of establishments and organisations rising up thanks to GMH, but yeah, nothing beats up-close and personal. Technological innovation and all that. I'd love to be able to walk into that tailors for tails shoppe you mentioned, and oh, it would make all to much sense for them to show their progressiveness by featuring your four-legged ramp idea!

I do want to eventually write something more focused on political intrigue and get into the debates about GMH and the effects on people, but that's further on down the road.

I specifically wrote On Call first because it allowed me to tell both a personal story and have a reason to share world details, both from the social perspective and just how GMH works. Growing Pains is a more personal story, focused on how one person or a small number of people deal with it.

After Growing Pains, I'll probably start exploring the world a lot more, telling stories from a lot of perspectives. As you and other people have mentioned, there's a lot to dig in to and build on.

As far as clothes tailored for tails, that's something I have thought of before. Many stories I've read in the past feature zippers or buttons to adjust size of the hole for the tail, but I've always thought that it would become an additional size, like waist and inseam. So you'd be buying pants that are something like 32x32xF3 or 32x38xB3. The F and B would refer to whether a tail is furry or bare; sizes can be a bit looser on a furry tail than a bare one.

Maybe an elastic ring like the cuffs on a windbreaker?

That's an option too.

Each manufacturer might put their own twist on it; they have fitted cuffs, collars, waist, and inseam, as well as manufactured sizes and elastic clothes. I imagine you could do all those things in a world with tails, and people might prefer different options. Additionally, something like an elastic tail cuff might be considered unprofessional in a businesses setting, necessitating proper sizing as you move up in the professional world.