Our female has had 3 litters and this last litter she did the same thing, at about 6 & 8 weeks. It is normal. The only thing as another posted, this can also be a sign of infection which is called pyometria. She will have a thick discharge sometimes pink or orangish color. It will have an odor and she will run a high temp. Their abdomen can be distended, loss of appetite and be slightly depressed.. As long as she's not experiencing these symptoms your in the clear. Not trying to scare you, just letting you know what is NOT normal....
