You can't avoid some smells but the strong ammonia odor of urine is usually easy to avoid if the cats are well trained and the litter is changed/cleaned regular

You can't avoid some smells but the strong ammonia odor of urine is usually easy to avoid if the cats are well trained and the litter is changed/cleaned regularly. I think the most common reason that it smells are cats that are spraying/marking which isn't always something up to the owner.