Quick answer
Choose Fromm Game Bird 4LB if you want a small, grain-free bag with turkey and goose to test or rotate recipes. Choose Diamond Naturals Lamb 40LB if you need a large, lamb-based bag for steady everyday feeding at a lower cost per pound.
Bag size changes how you feed and store
A 4-pound bag suits households with one small dog, a picky eater you are still testing, or a rotation schedule where the food is finished before it goes stale. A 40-pound bag lowers the frequency of reordering and the cost per pound, but it demands airtight storage and a consistent feeding routine so the food stays fresh through the whole bag.
Neither product record lists a kibble size, so if your dog is a fast eater or a toy breed, check the physical kibble before committing to a large bag.
Protein source and formula differences
Fromm Game Bird uses turkey, turkey broth, and goose in a grain-free blend that Fromm describes as complete and balanced for dogs of all ages and safe to alternate with other Four-Star recipes. Diamond Naturals Lamb is a lamb recipe positioned as a protein-rich everyday diet. If your dog has eaten lamb before without issue, the Diamond bag is the simpler repeat purchase; if you want to introduce a poultry mix or rotate proteins, the Fromm bag gives you a smaller trial size.
Price per pound and value trade-off
At the listed catalog prices, Fromm Game Bird 4LB costs more per pound than Diamond Naturals Lamb 40LB. The Fromm price buys a smaller, grain-free specialty blend; the Diamond price buys volume and a straightforward lamb formula. Paying more per pound only makes sense if the smaller bag prevents waste or if your dog specifically needs the grain-free poultry mix.
Trade-offs to weigh before you buy
- Small bag vs large bag: Pick the 4-pound Fromm bag if you are testing a new protein or feeding a small dog; pick the 40-pound Diamond bag if you have a settled routine and storage space for a large bag. Measure your dog's daily intake and estimate how many weeks each bag will last before ordering.
- Grain-free poultry mix vs lamb recipe: Fromm Game Bird combines turkey, turkey broth, and goose in a grain-free formula; Diamond Naturals Lamb is a lamb-based recipe. Match the protein to what your dog has already eaten successfully.
- Cost per pound: The 40-pound Diamond bag costs less per pound at the listed prices. Choose Fromm only if the smaller size or grain-free poultry blend is worth the higher per-pound cost to you. Compare the total cost of feeding for a month, not just the shelf price.
Product facts at a glance
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Fromm Game Bird 4LB: Grain-free blend of turkey, turkey broth, goose, fruits, and vegetables, sold in a 4-pound bag. A small grain-free bag lets you trial a poultry recipe or rotate proteins without committing to a large supply.
Fromm Game Bird 4LB
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Diamond Naturals Lamb 40LB: Lamb recipe in a 40-pound bag from Diamond Pet Foods. The large format supports long feeding stretches and a lower cost per pound for dogs that do well on lamb.
Diamond Naturals Lamb 40LB
Which bag fits your dog?
Best for
- Owners who want to trial a grain-free poultry recipe in a small bag
- Households rotating between Fromm Four-Star recipes
- Small dogs or single-dog homes that finish 4 pounds before it stales
Not for
- Multi-dog homes that need a large, economical bag
- Dogs that already thrive on a lamb recipe and need a repeat staple
- Owners without airtight storage for a 40-pound bag