I have been denied for several apartments from oth...

I have been denied for several apartments from other rental companies(4..., Rent in b...) they always have some excuse why they couldn't rent to me or they approved someone else before me, I am sure it is because I have an large emotional support dog, but there is no way to prove that's the reason. I applied for a cute apartment with sunnyside property's on maxwell that said no pets, but when I told them about my dog, they said no problem and approved me right away! They seem like very honest straight forward people that like dogs!