diet:
a retired Grey, will eat any thing if you let it! but a healthy diet of chicken necks, bones, kibble (dry food) and chicken, beef or kangaroo mince is great!
exercise:
not all greyhounds need to be walked! after retirement, they will actually be lazier then homer Simpson!
grooming:
not all Greys love water, but most love to be hosed down, it will make quite a messy experience though.
also you r Grey will not need to be micro chipped. when greyhounds are puppies, they are tattooed on the inside of their ears (OUCH!) this is then registered with all greyhound authorizes, so if you lose your Grey they will be found.