No pet building converting to pet building

[Bradley B.]

Hello. I recently took over an apartment building and It had a vaguely marked no pet building policy. I have some leases that say it is a pet friendly building and some leases that say it is a pet free building. I currently have angry tenants and am trying to problem solve and figure out the best way to fix this situation through either making it all pet friendly or all pet free so its not so disorganized. My initial thought was to start updating all new leases upon renewal, while this may be what I end up doing, all of my renewal dates are scattered far apart so I was hoping to get some advice on if there were any faster options to avoid waiting too long and causing reputation damage or lawyer issues in the long run where while I failed to do enough research I did not personally set these leases the way they are. 

Some helpful information is: On both sides of pet friendly or no pets, neither tenants would agree in signing a lease addendum.