Early Stages of False Pregnancy in Dogs

During their estrus cycles female dogs are hormonally pregnant, whether they are actually pregnant or not, reports the Mar Vista Animal Medical Center. Estrus cycles, which are similar to a human's menstrual cycles, cause the dog to produce the same hormones that it would in pregnancy. Only the puppies are missing. In most dogs, the hormones go back to normal after a few weeks and the body returns to its normal state. Some dogs, however, will begin to behave as if they are actually pregnant, and even go through some physical transformations that are typical to pregnant dogs.

  1. Nesting Behavior

    • Dogs that are pregnant typically create nesting areas in preparation for labor. Dogs that are experiencing false pregnancies will often do the same. They will collect blankets, towels and sheets, and place them on the floor in a chosen area, setting up a spot to give birth. The dogs might tear up paper in preparation for labor, as well, reports PetPlace.com.

    Mothering Behavior

    • False pregnancy, which usually occurs about three to four weeks after the heat cycle begins, can cause a dog to display mothering behavior towards inanimate objects, such as pillows, dolls, stuffed animals or towels. She may think the objects are her puppies and could become defensive and protective of them. She may also carry them around in her mouth and lick them.

    Mammary Gland Enlargement

    • According to PetPlace.com, dogs experiencing false pregnancy could undergo changes in their mammary glands. The glands may enlarge and even produce milk. Some dogs will lick their glands and create further milk production.

    Signs of Illness

    • Dogs that mistakenly think they are pregnant can actually look as though they are. According to Mar Vista Animal Medical Center, it is common for dogs with false pregnancies to experience abdominal distention. They may even gain weight and experience vaginal discharge, just like dogs that are actually pregnant. In addition, dogs with false pregnancies may display signs of gastrointestinal upset, including vomiting, diarrhea and loss of appetite. Owners should consult with a veterinarian if concerned that their dog is experiencing symptoms of false pregnancy.