Our female four-legged friends are subject to an odd phenomenon called pseudopregnancy, or false pregnancy. Any dog or cat that has not been spayed can be affected, though dogs are affected much more often than cats. In cases of false pregnancy, hormonal fluctuations trick your pet’s body into thinking that it is pregnant when it actually isn’t.

Signs and symptoms 

False pregnancy can be very confusing for pets and parents alike. Symptoms of false pregnancy mimic symptoms of pregnancy, and can include mammary swelling – usually around five weeks after a heat cycle – and even lactation. Abdominal distention and appetite changes are also common.

Accompanying the physical changes are changes in behavior. “Expectant” mothers can be restless, be unusually aggressive, and may start nesting. Caring for inanimate objects is perhaps the most disconcerting symptom owners report--one of my clients reported that her dog was taking small bags of potato chips to her bed and mothering them! Other likely “babies” might be toys or stuffed animals.

If pseudopregnancy happens once, it’s likely to happen recurringly. This is not a huge problem, unless of course you find the clinical signs unbearable. Some pets really do seem to have a hard time with false pregnancies. And rarely, mastitis or uterine infection can occur during an episode of false pregnancy. Studies have also shown that there is an increased risk of mammary tumors in dogs who have experienced more than three episodes of false pregnancy.

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So, what’s an owner to do? The short-term answer is simply to sit on your hands. There is little to be done if your dog or cat is experiencing a false pregnancy – time is all that is generally needed. Avoid touching your pet’s mammaries or allowing your pet to self-nurse. This will only serve to prolong lactation. Thankfully, clinical signs will resolve on their own as your pet’s hormones level out. In the meantime, consider having her wear a t-shirt or an e-collar to prevent nursing.

For a more long-term solution – and one that is better for your pet’s overall health, particularly if you don’t intend to breed her – after the event is over, you could consider having your dog spayed. Spaying not only prevents unwanted litters, but it also helps prevent uterine infections and mammary cancer. Don’t expect your vet to offer to spay your pet while she’s experiencing a false pregnancy episode, though, as doing so can actually prolong the clinical signs. Just call to schedule the procedure when your pet is feeling more like herself.

Apr 12, 2013
Pet Health

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