What are you feeding her now? What other foods did you want to incorporate into her diet? If you want to change dog food, remember to do a slow transition.
Slow transition to the new food is as follows to prevent diarrhea. If at any time during the transition, the pup has diarrhea return to previous amounts of food per feeding. If you are switching flavors made by the same manufacturer, you should not have to do a slow transition.
Amount per feeding:
Day 1-4 ¾ cup of old food and ¼ cup of new food.
Day 5-9 ½ cup of old food and ½ cup of new food.
Day 10-14 ¾ cup of new food and ¼ cup of old food
Day 15 Start 100% of new food
Generally, mastiffs are allergic to grain and chicken found in kibble. You can check
www.dogfoodadvisor.com for dog food ratings and customer feedback. Mastiff puppies can eat Large Breed puppy or adult food and they can continue to eat the food all of their lives or you can switch them to a Large Breed Adult Food at about 8-10 months.
Check out Acana Regionals, Wellness Core, Earthborn Holistics, Fromm*s or Taste of the Wild. Chewy.com is a great place to order dog food.
You may want to check out the raw diet for your pup. Check out the sub forum on raw diet that has a wealth of information. It is not recommended to feed the pup kibble (one with grains) and raw food. Dr. Becker talks about this in one of her videos. Search Dr. Becker*s videos on youtube.com for a lot of great information regarding the raw diet. There are 3 parts to the series. Well worth the time to watch the videos.
Slow and steady growth is best for a healthy mastiff. Do not be concerned with weight as much as body form.