My dog was given amoxicillin after the vet attempted to drain a cyst on her hip. He drew out a drop of fluid but primarily blood. He was unable to make a diagnosis from the drop of fluid that he drew off. He gave her amoxicllin for 2 weeks just in case there is an infection. The side effects of the antibiotic are tummy issues and urinary dribble. Thoughts on giving the anitbiotic and is there a more natural approach I can take for her. She is 11 years old. Since he attempted to aspirate the cyst, it has become larger.