It is an intense feeling of helplessness when we see our loved ones in pain and we can not do anything to appease the pain.
I used to have a Labrador once, he got sick.
The doctors could not save him. And I saw my childhood best friend die in front of me.
It is one of the worst memories of my childhood because he didn't die in a day, but he was sick for over a month and died slowly.
I felt the same helplessness that I am feeling now seeing this cute dog in pain.
So after that incident, I decided not have a dog again because I could not take the pain of detachment again.
Gosh sorry to hear that. I guess it's soemthing that i'll go through as well.