Thanks for the replies!
I'm going with anal glands as a probable cause.
I doubt if it's worms as she doesn't eat anythng that could cause them. Besides, her poops are well formed, she's not eating an overly large amount of food, and she's not losing weight. But, you never know! We'll have to wait and see what her Dr. says.
I'll keep you all posted as to the results.
"Always be a first-rate version of yourself, instead of a second-rate version of somebody else." - Judy Garland