Need help with cat behavior?

There's a plug-in I bought with feline facial pheromones that continously calms a cat all day, preventing them from marking and destructive behavior, the refills last about a month to a month and a half. It's called the 'ComfortZone with Feliway Plug-in' and it was the only solution for all my male cats and thier destructive habits of marking territory, fighting with other males, and stress. You can also buy what they call a 'Litter Attractant' powder that you can add to your litterbox's litter and it will make the cat more comfortable into using the litterbox. Make sure this litterbox is placed in a low traffic, quiet place.