A few weeks after a season, an unspayed bitch starts collecting soft toys into her bed, guarding them, going off her food, digging at blankets, and producing milk. She has not been mated and she is not pregnant.
This is false pregnancy — also called pseudopregnancy or phantom pregnancy — and it is common, normal in origin, and occasionally needs treating.
Why it happens
Here is the part that surprises people: the hormonal profile after a season is essentially identical in a pregnant and a non-pregnant bitch.
After ovulation, the corpus luteum in the ovary produces progesterone for roughly two months, whether or not conception occurred. As progesterone falls at the end of that period, prolactin rises — and prolactin is the hormone that drives milk production and maternal behaviour.
In a pregnant bitch, that timing lines up with whelping. In a non-pregnant bitch, the same hormonal sequence happens anyway, and in some individuals it produces the full behavioural and physical picture.
It is thought to be an evolutionary legacy of pack living, where non-breeding females could help nurse a litter. Whatever the origin, it is a normal physiological response rather than a disease.
When it appears
Typically six to twelve weeks after the end of a season, most often around four to nine weeks after.
Signs
Behavioural:
- Collecting and guarding soft toys, slippers or socks
- Nesting: digging at bedding, rearranging blankets, hiding under furniture
- Restlessness, whining, clinginess or, conversely, withdrawal
- Reduced appetite
- Reluctance to be separated from the “puppies”
- Occasionally, irritability or guarding of the nest
Physical:
- Mammary enlargement
- Milk production, ranging from a few drops to a genuine flow
- A slightly swollen abdomen
- Sometimes vomiting or lethargy
Does it need treating?
Often not.
Mild cases usually resolve on their own within two to three weeks. If the bitch is comfortable, eating reasonably and not distressed, supportive management is all that is required.
Treatment is worth seeking if:
- She is genuinely distressed
- She is producing a lot of milk and the mammary glands are hot, hard or painful
- She is not eating
- The behaviour persists beyond about three weeks
- She is licking the glands persistently, which stimulates more production
- She is guarding the nest aggressively
What not to do
Do not milk the glands. It feels helpful and it is the opposite of helpful. Stimulating the gland triggers more prolactin and more milk. The same applies to warm compresses and massage.
Do not let her lick them. If she is licking persistently, an inflatable collar or a body suit stops the cycle.
Do not remove the toys abruptly. For a bitch strongly attached to them, taking the “puppies” away suddenly causes real distress. Remove them gradually while increasing distraction.
Do not restrict water. Reducing food slightly for a few days is sometimes advised by vets to reduce milk production; restricting water is not appropriate.
Practical management
Increase exercise and distraction. Longer walks, more training, more games. Physical and mental activity reduces the behaviour and interrupts the nesting cycle.
Remove nesting material gradually. Take away the most-guarded items last.
Reduce food slightly for a few days if advised by your vet — a modest reduction can help reduce milk production.
Keep her occupied.
KONG Classic Dog Toy
Stuffed and frozen, it gives a restless bitch something absorbing to do that is not nesting. Rotate two or three so they stay interesting.
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Nina Ottosson Puzzle Level 2
Mental work is one of the more effective distractions during a phantom pregnancy. Short sessions several times a day work better than one long one.
Be patient with the behaviour. She is not being difficult. She is responding to her own hormones, and telling her off will not change the hormone levels.
Veterinary treatment
Cabergoline is the standard treatment. It suppresses prolactin, which reduces both milk production and the maternal behaviour. It is usually given for four to six days and works well.
Your vet may also treat mastitis if present, or prescribe something to make her more comfortable.
Recurrence and the spaying question
False pregnancy tends to recur after each season in bitches prone to it, and often gets more pronounced over time.
Spaying prevents it permanently — but timing matters.
Do not spay during a false pregnancy. Removing the ovaries mid-episode causes a sudden change in hormone levels that can make the signs worse and prolong them, sometimes for months. Vets generally advise waiting until the episode has fully resolved, usually at least a month or two afterwards, and ideally spaying at the midpoint between seasons.
Discuss the timing with your vet, along with the wider considerations about spaying — which include the risk of pyometra, mammary tumour risk, incontinence risk and, in some large breeds, orthopaedic considerations.
The short version
False pregnancy is common, normal in origin, and usually self-limiting. Increase activity, remove the nest gradually, do not touch the mammary glands, and see your vet if she is distressed, not eating, or the glands look inflamed.
And if it happens every season, talk to your vet about spaying — after the episode has passed, not during it.
