I love dogs and have always found quotes about dogs interesting. Primarily for what is being said, but I sometimes find who said it equally, if not more interesting. These are quotes that I have chosen to include in my memoir which is a collection of stories about the adventures, the misadventures that I have experienced with dogs.
I think dogs are the most amazing creatures;Gilda Radner
they give unconditional love.
For me they are the role model for being alive.
Let sleeping dogs lie – who wants to rouse ‘emCharles Dickens, David Copperfield
My little dog – a heartbeat at my feet.Edith Wharton
Cave CanemLatin proverb meaning ‘Beware of Dog’
Every dog is a lion at home.H.G.Bohn, Handbook of Proverbs 
The poor dog, in life the firmest friend,Lord Byron
The first to welcome, foremost to defend.
Happiness is a warm puppy.Charles Schultz
Love – that which biologists, nervous about being misunderstood, call ‘attachment’ – fuels the bond between dog and master or mistress.John Bradshaw, Dog Sense
Like a dog, he hunts in dreams.Alfred Tennyson, Locksley Hall 
The great pleasure of a dog is that youSamuel Butler
may make a fool of yourself with him
and not only will he not scold you, but
he will make a fool of himself too.
I agree with Agassiz that dogs possessCharles Darwin, The Descent of Man 
something very like a conscience.
A dog in the kitchen asks for no company.French proverb
A house without either a dog or catPortuguese proverb
is the house of a scoundrel.
If a dog will not come to you after having looked you in the face, you should go home and examine your conscience.Woodrow Wilson
It’s good when a dog is a friend, but it’s bad when a friend is a dog.Anonymous
The dog is the only creature who saw his God with his own eyes.Jack London
Qui me amat, amat et canem meumSt. Bernard, Sermon [ c.1155]
Love me, love my dog.
Recollect that the Almighty, who gave the dog to be companion of our pleasures and our tolls, hath invested him with a nature noble and incapable of deceit.Sir Walter Scott, The Talisman 
If you pick up a starving dog and make him prosperous, he will never bite you. This is the difference between a dog and a man.Mark Twain
The only creatures that are evolved enough to convey pure love are dogs and infants.Johnny Depp
Dogs are not our whole lives, but they make our lives whole.Roger Caras
Dogs are great. Bad dogs, if you can really call them that, are perhaps the greatest of all.John Grogan, Marley & Me: Life with the world’s worst dog
I’m suspicious of people who don’t like dogs,Bill Murray
but I trust a dog when it doesn’t like a person.
A dog is the only thing on earthJosh Billings
that loves you more than he loves himself.
It’s hard not to immediately fall in loveKate DiCamillo, Because of Winn-Dixie
with a dog who a a good sense of humor.
Everyone thinks they have the best dog.W.R.Purche
And none of them are wrong.
Don’t accept your dog’s admiration as conclusiveAnn Landers
evidence that you are wonderful.
What counts is not necessarily the size of the dog in the fight;Dwight D. Eisenhower
it’s the size of the fight in the dog.
Everything I know, I learned from dogs.Nora Ephron, The Search
People leave imprints on our lives…Ashly Lorenzana
Dogs, however, leave paw prints on our lives and souls,
which are as unique as fingerprints in every way.
The greatest fear dogs know is the fearStanley Coren
you will not come back when you go out the door without them.
Did you know there are over 300 words for love in canine?Gabrielle Zevin, Elsewhere
When an 85 lb. mammal licks your tears away,Kristan Higgins
and then tries to sit on your lap,
it’s hard to feel sad.
I have caught more ills from people sneezing over meBarbara Woodhouse
and giving me virus infections than from kissing dogs.
Petting, scratching, and cuddling a dog could be as soothing to the mind and heart as deep meditation and almost as good for the soul as prayer.Dean Koontz
Dogs do speak, but only to thoseOrhan Parnuk
Who know how to listen.
When God created dogs. He just sat back and smiled.Will Rogers
A dog can’t think that much about what he’s doing,Barbara Kingsolver, Animal Dreams
he just does what feels right.
You gonna eat that?
You gonna eat that?
You gonna eat that?
I’ll eat that.Karen Shepard, Birch
I don’t think twice about picking up my dog’s poop,Jonah Goldberg
but if another dog’s poop is next to it, I think, ‘Eww, dog poop!
The house is chaos sometimes when the dogs are trying to eat the kids’ food or jumping into the tub with them. But it’s worth it. Life with dogs is better.Drew Barrymore, Wildflower
I have a crippling fear of being without a dog.― Morgan Matson, Take Me Home Tonight
Why that dog is practically a Phi Beta KappaDorothy Parker
She can sit up and beg, and she can give her paw –
I don’t say she will but she can.
A dog’s got personality. Personality goes a long way.Quentin Tarantino
I can’t do everything I want, but I can put a smile on my dog’s face.Oliver Markus Malloy, Inside the Mind of an Introvert
Making him happy makes me happy.
Don’t you know that this is the only reason we are here,Jennifer Finney Boylan, Good Boy: My Life in Seven Dogs
to love one another, and to be loved?
Why is it that what is so obvious to dogs
is such a mystery to men and women?”
Just this side of heaven is a place called Rainbow Bridge.
When an animal dies that has been especially close to someone here, that pet goes to Rainbow Bridge. There are meadows and hills for all of our special friends so they can run and play together. There is plenty of food, water, and sunshine, and our friends are warm and comfortable.
All the animals who had been ill and old are restored to health and vigor. Those who were hurt or maimed are made whole and strong again, just as we remember them in our dreams of days and times gone by. The animals are happy and content, except for one small thing; they each miss someone very special to them, who had to be left behind.
They all run and play together, but the day comes when one suddenly stops and looks into the distance. His bright eyes are intent. His eager body quivers. Suddenly he begins to run from the group, flying over the green grass, his legs carrying him faster and faster.
You have been spotted, and when you and your special friend finally meet, you cling together in joyous reunion, never to be parted again. The happy kisses rain upon your face; your hands again caress the beloved head, and you look once more into the trusting eyes of your pet, so long gone from your life but never absent from your heart.
Then you cross the Rainbow Bridge together . . .Anonymous
My dog taught me everything I need to know. It’s okay sometimes to just eat and sleep. When you fall down, get back up, shake it off, forget about it, and go on. Be very brave no matter your size. Make your own fun. Unleash your talents. Learn new tricks no matter your age. Make new friends. Sniff out opportunities. Chase after your dreams. When loved ones come home always run to greet them. At the end of the day it’s best to snuggle no matter what happened. Every day is a brand-new day. Just be happy!Anonymous