I think it would be a good idea to bring this important companion to the vet for a check up. She's not terribly old, so I'm not thinking age is a factor, but that she's been breeding a lot could have caught up with her and caused some problems.
To be sure, bring a sample of her recent droppings with you when you go to the doctor so they can do routine labs on it, hopefully ruling out parasites or other types of intestinal infections/bacteria.
It's important to limit their breeding. They really shouldn't be allowed to have as many pregnancies as they might decide on their own to have Images available only to Customers.
Do you have the male as well? How is he doing? Any of the same symptoms? It might be wise to separate them at this time, just until the cause of this little girl's problems are identified and treated.
Please let me know what the vet says ok?
Many have forgotten this truth, but you must not forget it.
You remain responsible, forever, for what you have tamed.