Of the choices, perhaps it was the oddity of the 'Bitch (Domestic)' handle that caught your attention. Selecting that from the screen, there are no other menus but a rattling can be heard behind the wall. After almost a minute, out comes a pink collar with 'Molly' in the middle of a red heart tag. After that, you just heard the door behind you open and the sun's ray make the screen unreadable as you take the collar.
Back in the fair, you look back at the Arc ride and your novelty collar. Then you realize you've been had pretty good.
Trudging back to the fair proper, the normal assortment of rigged games and bad food were on display. As time passed, the urge to pee started to rise so you went looking for a place. You eventually find that among the rows of porto-potties. Finding the nearest open you, you slip in and quickly relieve yourself. After shaking, you hear the jingle of the collars tag.
Inspecting the thing again, the width of it was rather off and the more you looked the more you realized this was likely some sort of novelty sex toy, if anything, or a poor taste of kids toy, at worst. How it came to be in both of your hands and at your neck you don't remember but you decide to try and see if it fits. You hear the click of the clasp behind your right ear and when you check the small mirror in the stall, it was definitely meant for a human. Though certainly more female that you currently are.
You were about to exit when you caught yourself still with the tag on. Your fingers went searching for the clasps but was having trouble finding exactly where it was. You found yourself having to concentrate more and more as you continued to fiddle with finding the clip. The heat was also a factor and as time progressed, so were smells and growing lines outside.
Looking again in the mirror, something is off. Moving in closer, you lift your lip and see an odd discoloration of the gums you never had. Taking in more of the smile just showed that your teeth had gotten sharper and worst of all- so far- was that your nose was now black and protruding slightly and looking vaguely canine.
Knowing you can't process what's happening to you in this heated shit box, you quickly exit with hood up and make for where you think the parking lot is. You stumble near some generators behind a few trailers, taking a knee just as a tail starts to sprout above your ass. It was wiggling and sprouting fur but it wasn't even your first worry.
The blackening nose was the first change but not the last to your face's profile which had you fixated. Soon a muzzle was being tugged out of your once human visage too. Your ears were being tugged and reshaped, taking on more canine shapes at the expense of your human hair. Your cries coming out as whimpers only serves to punctuate your last testicle being pulled inside the swollen female canine sex that had grown between your legs. Your shriveled cock was above it but effectively useless
You were becoming a bitch and, judging by the taste of the smell coming from your crotch, coming into heat, so you needed to decide what to do. Quickly.