January 20, 2026

Protecting Your Dog

What You Need to Know

Ehrlichia canis is a serious disease affecting dogs, transmitted by the brown dog tick. Early detection and prevention are crucial, as symptoms can be vague and develop slowly, sometimes going unnoticed until the disease is advanced.

Common symptoms may include:

  • Lethargy or weakness
  • Loss of appetite
  • Fever
  • Weight loss
  • Nosebleeds or bruising on the skin
  • Swollen lymph nodes

“Early diagnosis and treatment significantly improves outcomes,” veterinary experts say.

If your dog is showing any of the above signs, seek veterinary assistance immediately.

Tick prevention is essential
Experts recommend a two-pronged approach to tick prevention. Using a reliable tick control product alongside a Seresto collar provides the best protection against Ehrlichia canis.

Why is this combination important? Ehrlichia canis is transmitted when an infected tick bites a dog. Many standard monthly tick preventatives only kill ticks after they attach, which may not be fast enough to prevent disease transmission. A Seresto collar adds an extra layer of defence, repelling and killing ticks on contact. This complementary protection is particularly useful if a preventative dose is delayed, tick pressure is high, or ticks attach before other products take effect.

When used alongside routine parasite control, a Seresto collar helps close protection gaps, giving dogs a stronger defence against this potentially life-threatening disease. Pet owners should note that Seresto collars remain effective against brown dog ticks for up to four months.

Taking preventative action now can keep your dog safe, healthy, and tick-free this season.