What is the short (about a centimeter) brown worm like thing, in my stool? I was having no pain when I used the bathroom, it was just a regular bathroom I had to go to, and there it was. Is it a parasite? Could I have gotten it from my dog? She is 6 pounds, mostly indoors, (goes outside to go pee in the front yard, she takes about 1 minute) and I kiss her on the nose . Is it from her?