Social Worker Gave My Dead Grandmother’s Dog Away Without Informing Next Of Kin

Florida: My grandmother was found dead in her apartment yesterday, I have not spoken to her in a few years but her sister and a family friend were in close contact. She lived in a low income apartment and the social worker had my moms info as the emergency contact/next of kin and informed her of her death and that she had a dog we needed to pick up, according to the close family friend she’s had the dog since she was a puppy for about 2 years. She was called this morning to pick up the dog and I went at 1pm to pick up her up and was told they gave the dog to the “owner”, I believe this must be the person she got the dog from when it was a puppy. They didn’t inform us of any “owner”, they just said this person had documentation of the dog so they gave them the dog without speaking to my mother about this. I’m having trouble understanding how they could give the dog to someone without telling my mom prior to handing it off, didn’t provide us with any of this proof of “ownership” which is also ridiculous because I can have documentation of many things I owned years ago that doesn’t prove I have it now and how they can make decisions on my mothers behalf without her consent if that’s my grandmothers belongings that are now the responsibility of my mother. I’m going to contact them on Thursday when their office opens, what do I say to them to get this rectified and get the dog back?