How Does One Go About Getting Business Insurance (state Of Ohio, City Of Hamilton)>?

My wife is going to be starting a Psychology private Practice LLC in the state of Ohio, Butler County, city of Hamilton. She has already obtained malpractice insurance, but she also needs business insurance. So, my questions are:
Does the Agent that sells me my homeowners and car insurance sell business insurance as well, or is there a specialized Agent we will need to contact?
Are there any Web price comparison/online Application sites that can be used for business insurance?
Answers from anyone with knowledge on the subject is appreciated!