When a friend or family member gets sick, we all want to know the signs. We want to spot that something is wrong and get them the help they need as soon as possible. But, unfortunately, it isn’t always easy to tell when our feline friends aren’t feeling well, so we’re left guessing. You must know the signs your cat is sick in order to provide him good treatment. Cats are notoriously bad at expressing pain and can suffer in silence for hours or days before showing any outward signs.