Trichuris vulpis (whipworm) is type of intestinal
parasites commonly affecting dogs. The whipworm lives in the large
intestine, where it bites the tissue and embeds its head inside. Like
the hookworm, the whipworm sucks the host's blood for sustenance. Whipworms are even smaller than roundworms and ovas are rarely seen in the stool. But here we have a positive case.
"See, It is a Trichuris egg" and the patient can confirm the finding.
Source: tumblr:Bunnyfood