cynophobia
noun
cy·no·pho·bia ˌsī-nə-ˈfō-bē-ə 
: pathological fear or loathing of dogs
If a person were attacked by a dog, that experience could prompt cynophobia, or fear of dogs.
Becky Swartswatter
Becky Swartswatter cynophobe
ˈsī-nə-ˌfōb
noun or cynophobic
ˌsī-nə-ˈfō-bik
plural cynophobes or cynophobics
Playwright William Shakespeare and Roman emperor Julius Caesar are among the people throughout history who have lived in terror of cats, and a cynophobe gets skittish around dogs. Jennifer MacKay
Jennifer MacKay cynophobic adjective
By the end, as the characters connect with each other with the help of their dogs, only the most cynophobic audience members will refuse to shed a tear or two. The Capital Times (Madison, Wisconsin)
The Capital Times (Madison, Wisconsin) 
Word History
Etymology
Greek kyno-, combining form of kýōn, genitive kynós "dog" + -phobia — more at hound entry 1
First Known Use
1830, in the meaning defined above
Medical Definition
cynophobia
noun
cy·no·pho·bia -ˈfō-bē-ə
: a morbid fear of dogs