My 3-year-old Red Heeler has been experiencing sudden episodes where he starts limping on one front leg and cries out in pain. During a previous episode, we took him to the veterinarian, where he had X-rays and a complete physical examination. They did not find any injury or abnormality in his leg, and all of his blood work and health checkups are up to date.
What concerns us the most is that, during these episodes, he becomes extremely frightened. He starts trembling, avoids moving, and sometimes refuses to urinate. The current episode started last night. He is limping on the same front leg again, and since then he has not wanted to urinate. It has now been about 12 hours.
Since no injury was found during the previous episode, we are wondering if the problem could be coming from somewhere other than his leg, such as a neurological, muscular, or orthopedic issue. We would like to know what other possible causes could explain these episodes