I have been trying to figure out the title of a book I read about two years ago. It has these animals in it that have been mutated with other animal genes. In the book, this girl and boy are trying to save these animals because the animals are being mutated with these genes to fight each other. The main animal in the book is a bat/fox. But all the animals in the book include: a dog with eagle wings, a tiger/scorpion, and alot of other ones. In the book the scientists who are mutating these animals has also mutated the mayors daughter into a lizard. Then a boy gets his hands on a syringe from the lab and injects himself and then he mutates into a tiger. This is all I can remember, thank you.

I have been trying to figure out the title of a book I read about two years ago. It has these animals in it that have been mutated with other animal genes. 

In the book, this girl and boy are trying to save these animals because the animals are being mutated with these genes to fight each other. The main animal in the book is a bat/fox. But all the animals in the book include: a dog with eagle wings, a tiger/scorpion, and a lot of other ones. 

In the book the scientists who are mutating these animals has also mutated the mayors daughter into a lizard. Then a boy gets his hands on a syringe from the lab and injects himself and then he mutates into a tiger.