Ontario Animal Health Network

08/17/2026

A primer on bats in Ontario, and what to do if you encounter a live bat indoors.

https://oahn.ca/resources/bats-in-ontario/

08/10/2026

Ontario Equine Disease Alert

-West Nile Virus in Simcoe County (Aug 6)

First confirmed case of equine WNV in Ontario this year.

More details, and a full list of Ontario Equine Disease Alerts here:

https://www.oahn.ca/resources/ontario-equine-disease-alerts/

08/05/2026

We have updated our OAHN Projects page with all of our completed projects from the past year, and all of our new projects now in progress. A few of our latest projects are listed below

https://www.oahn.ca/projects/

08/04/2026

The OAHN Companion Animal network has updated its Ticks and Lyme Disease infographic with established risk areas for deer ticks. This page also has many tick and Lyme disease resources for vets and pet owners.

https://oahn.ca/resources/ticks-and-lyme-disease-in-ontario-whats-the-real-risk-infographic-and-references/

07/30/2026

The OAHN Aquaculture network has organized a talk with Dr. Cheyenne R. Smith from the Eastern Ecological Science Center: Exploring a Potentially Transmissible Melanoma in Brown Bullhead: A Science Story.

To learn more and register, click here: https://www.oahn.ca/resources/exploring-a-potentially-transmissible-melanoma-in-brown-bullhead-a-science-story-with-dr-cheyenne-r-smith/

07/29/2026

"These findings indicate that melanoma in these brown bullheads represents the fourth documented type of naturally occurring transmissible cancer in animals, after dogs, Tasmanian devils and several bivalve species."

Whole-genome sequencing analysis of tumour and matched non-tumour host tissues of the brown bullhead catfish reveals a type of naturally occurring transmissible cancer.

07/29/2026

The OAHN Companion Animal network has updated its Ticks and Lyme Disease infographic with established risk areas for deer ticks. This page also has many tick and Lyme disease resources for vets and pet owners.

https://www.oahn.ca/resources/ticks-and-lyme-disease-in-ontario-whats-the-real-risk-infographic-and-references/

An infographic and references for veterinarians on ticks and Lyme disease in Ontario.

07/23/2026

'Rare' contagious cancer found in fish from Quebec and U.S. lakes

"a genetic study suggests that's what's happening with melanoma tumours among catfish in Quebec and the northeastern U.S."

https://cbc.ca/news/science/fish-transmissible-cancer-9.7279045

It's rare that cancerous tumours can spread from one individual to another. But a genetic study suggests that's what's happening with melanoma skin cancer tumours among catfish in Quebec and the northeastern U.S.

07/22/2026

'Rare' contagious cancer found in fish from Quebec and U.S. lakes

"a genetic study suggests that's what's happening with melanoma tumours among catfish in Quebec and the northeastern U.S."

https://www.cbc.ca/news/science/fish-transmissible-cancer-9.7279045

It's rare that cancerous tumours can spread from one individual to another. But a genetic study suggests that's what's happening with melanoma skin cancer tumours among catfish in Quebec and the northeastern U.S.

07/16/2026

We've recently updated our resources on the Wildfires and Emergency Management page. If you have any other resources to add to the list, please get in touch.

This page includes links for:

-Ontario wildfire situation
-Air Quality Health Index
-Emergency Preparedness for Farm Animals
-Livestock Evacuations
-Shelter in Place Tips and Information and more

https://www.oahn.ca/resources/wildfire-emergency-management/