My dog had a mass removed from her butt, and I brought her home today. She is on an antibiotic, pain/inflammatory, another pain medicine. Tonight she had her right eye randomly go lazy. She was about to fall asleep and her right eye started rolling back like she normally does, but her left one didn't move at all. Whats going on? Is this something that normally happens but I just haven't noticed? Is it the medicine?
She is a 9 1/2 year old female Jack Russell Terrier.