A tenant refused to remove her aggressive breed dog

I know it’s been discussed before.
A tenant just adopted a pittbull and argued that there are others who also has aggressive breed dogs (those dogs have been in the park before I purchased the park)

The park is in Michigan and we really have a hard time doing just-cause eviction.
Do you guys have any other creative idea to solve this issue other than filing a 30 day demand for possession?

Breed restrictions: Review lease & Michigan laws. Can you implement restrictions on new tenants (not affecting current ones)?
Mandatory training & insurance: Require aggressive breed training & renter’s insurance with dog bite coverage.
Mediation: Offer mediation to find a solution (e.g., muzzling, leash rules) that protects everyone.