I am so so sorry for your great loss. I lost Sidekick (13 yr) my Pom over a year ago (my avatar). Reading about your Maggie I see she had the same personality as my Side, he was my "happy". He too had Cushings, and 8 other diseases, like Maggie, no one ever knew how sick he was because of his happy spirit, he too shocked all the Specialists because he was like the energizer bunny, he just kept going and going. He even was at the vets for a skin condition, and the vet mentioned she heard something in his lungs, but didn't make a big deal out of it, but the rest of the day he couldn't lay down and panted nonstop, I finally took him to the ER. He did fine in the oxygen tank (his oxygen level was a shocking 56) and even started barking which to me was a good sign they took him out so I could take him home, I put him on the ground and he took off down the hallway, he had had it with doctors and wanted out, 30 seconds before he died he was running down the hallway of the ER....I picked him up, his head fell over and he died, I was in shock for a long time.
I know the deep grief and loss. I have tears in my eyes for you.........be gentle with yourself, spiritdog
"People disappoint, dogs never do" - spiritdog
"You MUST be your pets ADVOCATE, if it doesn't feel right walk away." - spiritdog