It was a semi normal day at the local zoo, it was full of people looking at the animals and exploring the buildings. There where a long list of people in the zoo, some where families, some where there alone, some elderly people people watching, couples on dates and many other types of people. None of them knew what was about to happen to them.
The first thing they noticed was a slight tremor in the ground, just enough to cause the water in fountains to ripple and the animals to notice. Most of the humans if they did notice only did a WTF moment before moving on. Then it happened again but stronger and longer causing some people to scream and yell Earthquake.
But this was no Earthquake, instead rising out of the ground knocking over a large fountain near the center of the zoo came a large crystal. It rose and rose into the sky, one story, then two stories, finally topping out somewhere near 4 stories tall. Once it stopped rising everyone just stopped and looked at it confused.
Then the clouds parted, and the sunlight hit it, a flash of energy shot out engulfing everyone within the zoo. It was strong enough to pass into buildings reaching everyone.
The humans didn’t know that since this shard released all it’s contained magic at once with so many people and animals around that it would transform everyone, using whatever animal they had been around as a template to transform them.
If a person was standing next to the wolves, they would soon find themselves an anthro wolf. If they where by the big cats, an anthro cat would be their fate. If they where in the reptile house, they would soon find themselves as anthro snakes or lizards, same with the bird house. Petting a horse, you are now part horse. Feeding an elephant you will now be part elephant and so on. It all depended on where you where in the zoo when the shard broke through the surface.
Soon everyone in the zoo would find that they where leaving humanity behind and becoming what some people would call furries.