Get Your Dog Care Questions Answered by Experts
Some bloody discharge is normal. Heavy bleeding is not. The discharge should be getting lighter and lighter and should be fading to pink and then stopping. If it has not slowed, you should be a little worried.
There is a dangerous uterine infection that sometimes affects mothers after delivery. It is called pyometra.
I suggest that you take her temp with a rectal thermometer and see if it's elevated. Normal temp for a dog is 101-102.5.
If it's elevated, you need to rush to the vet right away.
Let me know if you have more questions about this.