You remember Jasper, your neighbor's dog, how he would try and hump your leg when you would visit there. Odds were in his favor now and you didn't dare risk it, he was sure to hump more than your leg this time.
To the south was further out of town, where the junk yard and semitary were, both were known to have dogs and strays running about.
The city to the north seemed the only logical place to seek help. There they had a strict leash policy for dogs.
There Luke felt was the best and safest place to seek help in changing back from the female dog he now was.