Can Dogs Get Lice?
Can dogs get lice? This is another very common question we get asked. The simple answer is dogs cannot catch human head lice and this blog explains why.
Feb 21, 2026 · 4 min read
TL;DR
Dogs cannot get human head lice. Lice are species-specific: human lice only live on humans; dog lice only on dogs. Different species, different hosts.
Human and animal blood differences
Human head lice (Pediculus humanus capitis) feed on human blood. Dog lice (e.g. Linognathus setosus) are a different species and live on dogs. They don't cross over.
Lice species
If your dog is scratching, it could be fleas, mites, or dog lice — not human head lice. Treat human head lice with silicone- or oil-based products or wet combing. Not sure? Check first. For hands-on help, find a clinic near you.