Why Is My Dog Aggressive All of a Sudden? Possible Causes

If your dog suddenly starts growling, snapping, or acting tense, it can feel upsetting and confusing. The change often points to pain, fear, stress, or a medical issue that is making your dog feel unsafe. Sometimes the trigger is simple, like a sore ear or a new pet in the house. Other times it is more serious. The cause is not always obvious, and the clue could be hiding in plain sight.










