I've had a chance to preview the audience questions for our webinar on Tick Borne Infectious Diseases in North America, and wonder your thoughts on this question:
Can tick borne infectious diseases be associated with changes in a dog's behavior ... in particular, aggression?
Any illness that causes discomfort to an animal can increase an animal's frequency and/or intensity of aggressive responses. Many tick borne illnesses can cause discomfort, for example a classic sign of Lyme Disease in dogs is shifting leg lamness. There are very few reasons for an animal to limp or be lame that don't involve pain.