Answer:
My second is performed by my first. A thief by the marks of my whole might be caught. What am I?
I am the kind of dog that chases anything red. What am I?
I spend the day at the window go to the table for meals and hide at night.
I can swim but never get wet. I can run but never get tired. I follow you everywhere but never say a word.
What is shaped like a box, has no feet, and runs up and down?
I am the kind of an ant that's good at math. What am I?