A deadly outbreak of feline disease has killed 20 cats in Rivière-du-Loup, Quebec, CBC Montreal reported on Sunday, in a story that led the region's weekend coverage.

Feline outbreaks of this size are a particular fear in multi-cat environments — shelters, catteries and colonies — where a contagious pathogen can move through a population faster than it can be isolated, and where vaccination and quarantine status decide how far it spreads.

For owners in the Rivière-du-Loup area, the practical guidance from veterinarians in such outbreaks is consistent: keep cats indoors, watch for sudden illness, separate any sick animal immediately, and contact a clinic before bringing a symptomatic cat in, so staff can prepare isolation measures.

CBC's early reporting did not name the specific disease in its headline summary, and local confirmation of the pathogen and its source will determine whether the outbreak stays a local animal-health emergency or points to a wider regional risk. OTMedia will update this story as those details are confirmed.