Our 10 yr old German Shepard just developed bulging eyes. (7) days prior to us noticing this problem, he was put on Trimethaprim 480mg 1.5 times per day for an anal gland infection. In conjuction with the bulging eye issue, he was having difficulty walking and was very weak. Upon returning to the Vet, he tested positive for anaplasma, which he previously showed no signs of. The vet did a battery of blood and urine tests and all have come back normal - thyroid, kidney function, white and red blood cell count, diabetes etc. He also tested for Glaucoma. He did not test for Hypertension.
The vet said that the bulging eyes could be a result of pain, but I don't think this is it. Any thoughts on what we should check for? He is a very active for his age.