Dangerous breed service animals

[Daniel Luedtke]

Looking at potential new tenants for a recently vacant unit.  One prospective new tenant has a service dog, that I believe is a dangerous breed, or a mix with a dangerous breed (pitbull).  I do not allow dangerous breeds in my units.  However, since it is a service dog, do I still have a right to turn them away because of the breed?  Or since it is a service animal, do I not have that right?