I'm not a surgeon but in my training as a family physician who assisted in hernia repairs, I never heard of a hernia repair on one side causing a hernia on the other. However, folks who have a hernia...
There are many types of hernias seen in dogs and most of them probably would not be a good explanation for the blood in her stools. You should have a thorough examination of her by your veterinarian
Dr. Anshu Gupta
There are two main types of hiatal hernias: sliding and paraesophageal (next to the esophagus).
Sliding... through the hiatus. This is the more common type of hernia.
Can Sleep Apnea Cause Hiatal Hernias?by
Dr. Steven P.
Someone emailed me in response to my comment that hiatal hernias may be related to sleep apnea.... I did mention that it’s a hypothesis, and yet to be proven. In my opinion, a hiatal hernia is similar...