Congratulations on your new litter. What you were feeling was the uterus contracting. After all the pups are delivered the uterus will continue to contract in order to expel any retained afterbirth. The uterus will get really hard during a contraction then it will relax.
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"Lord grant me the serenity to accept the things I cannot change, the courage to change the things I can, and the wisdom to know the difference." |