Something strange is going on. I would have the dog checked by a vet. If you go to the sticky on ''My dog won't eat'', https://www.askmehelpdesk.com/dogs/i...tml#post254171
It starts with the case of a dog needing to see the vet for a sudden loss of appetite. It is much more comprehensive than the old question refereed to above.
No, a healthy dog won't starve itself. For an 8 year old to make such a sudden change, means that something has changed. I doubt that part way through the bag, the food became contaminated. Try www.(your
brand).com Most of the brands will have a link to their recalls on their home page. If not, see https://www.askmehelpdesk.com/dogs/c...ll-72873.html?
or post back with your brand and I will check on it This recall thing has just grown and grown. I am feeding one dog Pro Plan dry chicken and rice and the other dry Iams lamb and rice. I calmed down a little after I realized I would be personally notified if there was a problem with either. My dogs are both part of a large service dog program, and they would immediately notify everybody with a dog in the program if there was a problem with the chow they feed. If you want to switch, I am sure both the chows above are safe.
You don't want to feed the hamburger and rice very long. As mentioned in the sticky, such diets are only for temporary use. You need to get her back on a regular dry chow as soon as you can. It is about the only way the average dog owner can insure their dog is getting the complete and balanced diet dogs need. It would be best if you can stick to the old food. Most Shepherds are fairly light eaters, refusing to eat more than they need. Free feeding works well with them.
The site referenced above is Purina, a reliable site, but often people Google up sites put up by some kook. I have seen some terrible advice on such links. Frankly, I didn't think the first post was very good. For all theother suggestions, it missed the sticky. You would have done as well to do your own search.