Feline blue and misunderstood? Spare a thought for cats whose owners can not tell when they are happy or sad, according to a new poll.
Two-thirds of people who own cats are unaware that purring is a sign of pain as well as contentment, the survey for the charity Cats Protection revealed.
The poll also found that more than two-thirds - 67 percent - do not recognise a tail in the air as a sign of greeting.
Of those owners surveyed, 49 percent are not aware that licking lips is a sign of stress in cats rather than an indication that they are feeling hungry or have a dry mouth.
More than a third of cat owners do not know that scared cats move their ears down, the survey suggests.
And 27 percent mistakenly think that malting is a cat's way of marking its territory, when felines actually mark their territory by rubbing their faces against furniture.
But it is not all bad news for cats - 69 percent of owners can tell that a slow blinking cat is relaxing, while 68 percent knew that a cat with its stomach on show is giving a relaxed greeting.
The online survey, carried out by ICM for Cats Protection, interviewed 1,100 cat owners.