Dog Tapeworm Segments (Proglottids)
Scientific Name: Dipylidium caninum
Order & Family: Order: Cyclophyllidea, Family: Dipylidiidae
Size: Proglottids are typically roughly the size of a grain of rice or a cucumber seed (approx. 3-6mm long) when fresh, but shrivel to smaller, sesame-seed-like sizes when dried.
Natural Habitat
Intestines of host animals (dogs, cats, occasionally humans). The dried segments found in the environment are typically found on pet bedding, near the animal's anus, or in feces.
Diet & Feeding
The adult tapeworm absorbs nutrients directly from the host's intestinal contents. The detached segments do not eat; they contain egg packets.
Behavior Patterns
Adult worms live in the small intestine. They shed segments (proglottids) containing eggs, which exit through the anus. These segments are mobile when fresh and often look like wriggling rice grains. Once dried (as likely seen in the image), they look like yellow sesame seeds.
Risks & Benefits
Parasitic risk to pets and humans. While generally not life-threatening, they cause discomfort, itching (scooting), and weight loss. Transmission occurs by ingesting infected fleas, so they indicate a flea infestation.
Identified on: 2/23/2026