How Do Dogs Get Roundworms?
There are several ways your dog could become infected by roundworms.2 Learning the different ways your dog may contract roundworms can help you take measures to protect them from infection.
- In Utero or While Nursing. Infected mothers can pass roundworms to their puppies either in utero or through the mother’s milk while nursing. This is the most common mode of infection and the reason why roundworms are so common in young puppies.2
- Contaminated Feces. Because infected dogs have contaminated feces, other dogs can contract roundworms by sniffing or licking the infected feces.
- Self-Grooming. Roundworm eggs can attach themselves to your dog’s fur. If your dog swallows any of the eggs while licking himself, a roundworm infection can develop.
- Accidental Transport Hosts. Roundworms can also be spread through paratenic hosts, or accidental transport hosts. This happens if a dog eats another animal that has been infected, such as an earthworm, cockroach, bird, or rodent.