Putting down a family dog can be very tough. I could see someone having great difficulty facing it. I am trying to be charitable here.
So you let him die in the company of and at the hands of strangers?
No.
Never.
My last Dog was riddled with Cancer, and I promised him I wouldn’t put him through any pain. He was a rescued from a kill list 15 years earlier. I watched him go and bid him farewell. Miss him all the time.