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Posted On May 03, 2016

Updated On Jun 25, 2025

Tick Borne Infectious Diseases And Effect On Behavior

Behavior

This question was submitted during a past webinar titled Tick Borne Infectious Diseases in North America:

Question:
Can tick borne infectious diseases be associated with changes in a dog's behavior ... in particular, aggression?

Answer by E'Lise Christensen, DVM, DACVB:
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.