Can A Cat And A Dog Be Friends?

some people think that dogs and cats can't be friends well look at this picture and read the story

the story behind this pic is this :
Every day -at the same time- she waits for him
He comes ... and they go for a walk
Wouldn't be great if we all had friends like this. . . no words needed

they just intuitively reconize the value of each other in their lives and act accordingly
cat and god are friends so why we human fight all time , why can't we do like them and live happy in peace!