I am sorry about both of your losses. May you find comfort in the memories you have of your pet. sara
I'm so sorry about your loss.
Our dog just passed away a couple hours ago too. He had an autoimmune disorder - no tumors and passed the same way. Shallow breathing until he stopped. Also on a blanket on the dining room floor. It does my heart good to see this is how dogs go regardless of cause of death. We also asked ourselves why the sudden loss of breath. We wondered if he was choking or caught pneumonia, or was just tired and gave up. It's a very heartbreaking thing to see.
could she have eaten something odd like panty hose? they get accordian-ed up in the intestines- anything elastic-y such as rubber bands- my dog loves to eat them- maybe a srot of a leathery taste- I don't know what the attraction is-
the only other things is internal injury or as you said fast growing tumor- could be so many different things- please don't blame yourself for any of it just celebrate the time you did have together- We are here if you need support~
regardless I am soooo sorry for you and I know you are grieving.