A ducktor.
No
A person who treats sick people is typically called a healthcare professional, which can encompass a variety of roles, including doctors, nurses, and physician assistants. More specifically, a doctor is often referred to as a physician, while nurses provide essential care and support. Together, they work to diagnose and treat illnesses, promote health, and provide patient care.
Such a person, who just treats feet, is a Chiropodist.
Take it to a vet that treats large animals.
they can get sick
The person who treats foot complaints is a Podiatrist
if the person is sick, and you are close enough to the person, then yes you can get sick. But if you are sick and you breath on someone, then that person could get sick. If you or the person who you are breathing on are both healthy, then it would be hard to get sick, in fact if someone is going to get sick, then it will be the person who you are breathing on.
Yes, humans can eat guinea pig treats. However, if you eat enough of them, you will probably get sick.
A doctor or your parents treat you when you are sick.
A person who treats his or her guests well is referred to as a "good host", or a "gracious host".
Of course, if the person giving the treats is inconsistent or intentionally confusing in the way the treats are given.