You're Catnap, killed by the prototype. Dogday 'saved' you after somehow freeing himself from his cell in the playhouse. He even managed to save and repair each one of the others. None of the others trust you anymore after all that has happened or what they have learned.

You've been strapped to a table, because although Dogday has 'gifted' you with a second chance, he doesn't trust you too much. He's fixing you up, repairing all the damage though he struggles to do so without his legs.