Dogs sure do get into our hearts. They are always there, so when we lose them it leaves a huge hole in our lives and hearts. We never get over them, or even deal with their loss, we just get used to living without them.
The space they filled can never be filled again. They are angels sent to watch over us. All angels have to go back to heaven. They are never here long enough. They remind us how precious every moment of life is. Dogs are remarkable creatures. I cannot imagine a life without them.