
If they're allowed to keep their 'babies' then the symptoms can last for many weeks, and if they have lots of milk it can cause them great physical and mental distress. Better to remove any substitute babies, reduce their food and increase their exercise, keeping the bitch too busy to have time to fret. This way the body soon gives up on the idea that there are puppies to care for and the phantom passes sooner.
She can be spayed when there are absolutely
no symptoms of phantom pregnancy - when she is completely back to normal, both mentally and physically.