I have a three year old Golden Ret. Who has eaten Science Diet since the day she was born? The Last three days she has not eaten but does drink water and has eaten a few pieces of lunch meat and a small piece of turkey.
She does not have worms. She shares a pen with a 1 year old golden who is a male. Any advice would help.

Take her to a vet. She's definitely got something going on that needs checked out very soon.

Yes, call the vet. This is just the opposite of the last question on a dog not eating. Most Goldens are eager eaters. Any sudden failure to eat means a physical problem. Even if overweight, that is not the problem in this case.