The Grass-Eating Garden Pets

I was passing through an area known to be inhabited by silly-creatures. Everything appeared to be peaceful until I laid eyes on two silly-creatures taking their garden pets for a walk. The garden pets seemed tame, but rather noisy and boisterous. And they appear to be herbivorous or grassing-eating. Judging from their appetite, they seem to go a long time without food. In the interest of research I decided to get a closer look. Confidence can tame any beast (but don't count on it).