See the sticky on ''My dog won't eat'',
http://www.askmehelpdesk.com/dogs/in...tml#post254171 In most cases, tempting a dog with rich food is the wrong thing to do. Now that her growth has slowed, she may need less food. You may only need to cut back on what you are feeding.
She may be doing a false pregnancy. If it is over a month since her season, the vet can confirm she isn't pregnant.
Why haven't you spayed her? What we need are more homes for dogs, not more people breeding them. Is she an unusually fine example of the breed? In what ways is she outstanding? Please go to
American Kennel Club - akc.org and read what they say if you are considering breeding. Read some books. Responsible breeding is far more work and far lass profitable than many people realize. Start with Successful Dog Breeding, by Chris Walkowicz, DMV.