hard to get scale in that picture, both are greyhounds & about 28 kilos each. both ten yrs. old this year.
millie used to run professionally at the local dog racing track till she was injured in 2004 and i adopter her shortly after, she was quite good at it.
blue never ran as a racer, got him as a 10 month old pup, he is believed to be from traveller (nomadic gypsy) stock used to course and hunt rabbits. he'd apparently escaped from them & had been picked up by the police and turned in to the shelter where i found him. he's not as heavily muscled as millie as he was never trained for the track, but he has more endurance.
their ears are known as rose ears and can stand straight up with the tips almost touching when they get excited and are listening intently. they are generally folded flat back where they have a convoluted rose-like look. unlike other dogs, ears back is not aggressive.
their feet have longer toes and are compared to rabbits feet, and their toes are partially webbed, all for added traction. they have larger hearts than other breeds, confusing vets not familiar with them who think they have heart failure; they also have different blood chemistry, more red blood cells, and half the fat cells of other breeds. they also have VERY thin skin that tears easily (and makes veterinarian's accountants happy) which is why they wear muzzles when racing.
they are a very non-aggressive breed, at the very bottom of the rankings as far as biting humans, and are one of the ancient breeds that has been with us for many thousands of years. they are also
extremely lazy, do NOT require much exercise, or space and sleep most of the day, much like cheetahs. (cheetahs are faster over the 1st hundred yards or so then the greys out-endure them)
whippets are smaller
this picture shows the difference:
top:greyhound (not mine)
middle:whippet
bottom: italian greyhound
Blue is a blue brindle (light brown with gray stripes) like the greyhound in the comparison. Millie is a dark brindle and white (her patches are very dark brown with slightly lighter stripes). i can trace Millie's ancestry back to 1758, unlike my own or blue's
here's my other pet, oscar the fighting snail. he is a master at escrima.
just kidding, thought it was time for a bit of jocularity.