I have two tomcats that do not get along! One named Boots and one named Sneakers! Sneakers hates other animals, but Boots is the sweetest cat ever! What am I supposed to do?

Have they been neutered? Please get that done by the time they are nine months old. Otherwise, they will start spraying a musky-smelling urine to mark their territory.

How long have you had them? Is this a new problem?

Not all toms get along. Some absolutely hate having any other males around. There's not always something you can do about it.

I have had Sneakers for 5 years. But I have had boots for 6 months. This is not a new problem. They have calmed down a little through time but they will still fight.

This is often what male cats do.

Sounds like they're just being typical toms. They may stop fighting as much if one establishes himself as alpha.