Birthright - Book Two of The Dekka Cats

When Longshank's elders escaped from a genetics lab, they found that they had been given the same intellect as their creators. Together, these 'Dekka' cats formed a secret feline society, hidden on the edges of the human world. For a while, Longshanks has the good life. He's found a comfortable new home, complete with his own human servant. But he discovers a research lab in the aquarium of an old amusement park. It's a place of horrors, guarded by vicious dogs and genetically mutated monst...