RIP Siver Back. Jack keep your head up.Some people think we're crazy and say : it's just a dog,But we here understand that there are dogs & there are companions. Companions are your buddies day in and day out,dogs can be replaced(some very easily)companions are irreplaceable and FOREVER missed. I had to put one down 2 months ago.I use dry ice to produce Co2,it put them to sleep & they're gone.It's better for me to put a companion down like that.