Hi Andi and Doug--

There's nothing I can write that would convey my sense of my understanding of what you are going through, only that I've lost two "best friends" (golden retrievers)) over the last five years.
One, and a very special friend, I lost through a prolonged and debilitating decline due to lymphoma.

None of us (hopefully) are just pet "owners", we are all "custodians" for our special friends. There is a difference...

Best regards to you, Doug, and Maggie--
Bill