Kipling's 'Power of the dog' gets me every time, all about giving your heart to a dog:
THERE is sorrow enough in the natural way
From men and women to fill our day;
And when we are certain of sorrow in store,
Why do we always arrange for more?
Brothers and sisters, I bid you beware
Of giving your heart to a dog to tear.
.....
and so it goes on.
Those cockies are really such wonderful dogs to know, so sorry to hear about your losses.