do you think maybe a hog knows which dog is more scared and uses him as an escape hole?
Yup! I walked up to a bay and a puppy backed up and looked me. The boar charged him within seconds. The color does play in too. What would you do to out of something? you push until something gives and then run as fast as you can! So if it is weaker it will get pushed more. If it stands out it will get pushed more. Just my 2 cents.