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Sharing the Turf - Scent Messages

It is essential to understand the importance and function of feline scent marking if we wish to control it. All cat owners have observed rubbing behaviors performed by their cats for the purpose of marking objects or individuals in their territory. Cats have greatly enlarged sebaceous glands around the mouth, on the chin, in the ear canals, in the perianal area, and at the base of the tail. When rubbing these areas of their bodies on objects or individuals, they leave a chemical scent behind which is very reassuring to the cat and non-offensive to humans. (The sweat glands in the skin of the paws also leave an olfactory cue when the cat scratches.) When we stroke a cat or it rubs itself against our legs, we pick up these scents ourselves. Consequently, we then have a group scent identification. Allorubbing creates group scent between cats in multi-cat households. This potpourri of familiar scents helps cats feel comfortable and secure in their home territory. Any change in the scent structure of the home (eg., a new pet, person, or even a new piece of furniture) may trigger a highly objectionable form of scent marking--spraying.

Spraying is accomplished by squirting a powerful jet of urine backward onto vertical features of the environment--doors, windows, drapes, walls, etc.--about 8 inches above the floor. Both male and female cats, whether neutered or not, can do this. Cats regularly revisit sprayed areas to "freshen up" the scent when it starts to decline. When investigating another cat's urine mark, the cat will display a curious, grimacing pose with its mouth partly open. It is using the vomeronasal, or Jacobson's organ, which is located behind the incisor teeth in the roof of the mouth. This extra sense allows the cat to smell and taste an odor at the same time and sends a powerful signal to the cat's brain activating a territorial response.

A new product that has been available for about a year promises to be very helpful in reducing the stress that leads to spraying. Feliway is an environmental spray that consists of a synthetic chemical that mimics the scent found in the gland near the lips of cats (the facial pheromones). It is available through veterinary clinics and sells for about $35 to $40 a bottle. Feliway is sprayed directly on spots that have been previously sprayed by the cat and washed with water. When the cat returns to the area to freshen up his mark, he sniffs the Feliway and gets the message that this spot has already been marked facially. It appears to have a calming effect on cats and cat carriers and cages in veterinary clinics as well as in humane societies that have been spritzed with this product tend to be less traumatizing for cats.

Even with the use of Feliway, the fundamental cause of the spraying problem must be addressed. It is necessary to reduce the cat's exposure to the stimuli that trigger marking and altering the cat's response. If it is caused by the sight of outdoor cats, the drapes must be pulled or the cat must be kept out of the room during the time of day when the strays are most likely to appear. If tension between cats in the household is contributing to the problem, the competing cats may have to be restricted to separate areas in the house. (A gradual and systematic reintroduction may help to diffuse the anxiety between the cats.) "In households with a large number of cats, the problem may not stop unless the number of cats is reduced"--Wayne Hunthausen, DVM.

If there is no other viable solution...a drug that has also been recently introduced for use in cats, Buspirone, has proven helpful in a number of spraying cases involving territorial stress due to competition between cats in the home. Discuss this option with your veterinarian.

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