How do you get the horse to jump over fence into fields and meadows in paws claws pet vet?

Unfortunately, there's no specific mechanic or trick in "Paws, Claws, Pet Vet" that allows you to make your horse jump over fences into fields and meadows.

The game focuses primarily on veterinary care and management of your animal clinic. While you can interact with animals and take them for walks, the game doesn't offer any "open world" exploration or gameplay elements like horseback riding or jumping fences.

However, this might be a feature request you could consider sending to the game developers! They might be interested in adding more interactive elements to the game in future updates.