Answer:
I am the kind of dog that chases anything red.
I have a little pool with two layers of wall around it. One white and soft and the other dark and hard. What am I?
I am a busy worker who is a water mammal.
I cannot be burned in fire or drowned in water. What am I?
I am heavy forward but backward I am not. What am I?
It has no top or bottom, but it can hold flesh, bones, and blood all at the same time.