I've never seen the dog one! Both of them cracked me up, though! No matter how many times I see the cat one, it still gets me to giggling!!
"We are--each of us--dying; it's how we live in the meantime that makes the difference."
"It's not what you gather, but what you scatter that tells what kind of life you have lived!"
"Be kinder than necessary, for everyone you meet is fighting some kind of battle."