Most of my commute is through a residential area and I encounter a lot of dogs, cats and squirrels during my rides. (I actually almost ran into a squirrel the other day, because it dumbly darted in front of me.) Anyway, cats and squirrels tend to run from me; dogs, naturally, tend to bark and chase. I've decided my least favorite dog breeds to be chased by are schnauzers and chihuahua/chihuahua mixes. Yep. Little annoying beasties.