How long is the incubation period for canine parvovirus?

The incubation period for canine parvovirus is typically 3–5 days, but in some cases it can extend up to 14 days before symptoms appear.

Average incubation: Most dogs show signs 3–5 days after exposure.
Extended range: In rare cases, symptoms may not appear until up to 14 days post-exposure.
Early signs: Lethargy, loss of appetite, fever, and gastrointestinal distress (vomiting, diarrhea).
High risk group: Puppies between 6–20 weeks old are most vulnerable, though older dogs can also be affected.

Stage	Timeline	What Happens
Exposure	Day 0	Dog comes into contact with virus (feces, contaminated surfaces, other dogs).
Incubation	3–5 days (up to 14)	Virus replicates silently; no visible symptoms yet.
Symptom Onset	5–8 days after exposure	Gastrointestinal illness begins: vomiting, diarrhea, dehydration, lethargy.
Diagnosis & Treatment	Immediate after symptoms	Veterinary evaluation, supportive care, hospitalization if severe.

Silent spread: Dogs can shed the virus before showing symptoms, making early isolation critical.
Environmental persistence: Parvovirus is extremely hardy, surviving for months in contaminated areas.
Prevention: Vaccination is the most effective protection. Puppies require a series of shots starting at 6–8 weeks.