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It does have grit CMB, easy to miss on the ingredient list but it's there.
The other problem is the added vitamins, bird nutritional needs are doubtless different from hams so that could lead to problems.

Ingredients
A mix of five or more of the following seeds and whole grains: White French Millet, Panorama Millet, Panicum, Sorghum, Canola Seed, Canary Seed, Dehulled Oats, Japanese Millet, Shirohie Millet, Wheat, Red Millet, Linseed; Shell Grit; NUTRIVIT™ (containing ground cereals and essential vitamins and minerals, including Calcium, Vit E, Vit C, Panthothenic acid, Niacin, Vit A, Iodine, Vit B6, Vit B2, Vit B12, Vit D3, Vit B1, & Folic acid); Vegetable Oil.