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Nulo vs Protein Boost

Nulo is made by Nulo, Inc. (owned by Apax Partners), and Protein Boost by K9 Natural Foods Limited (owned by KKR (Natural Pet Food Group)). On KibbleLab, Protein Boost averages 8.6 out of 10 across its scored foods, compared with 8.3 for Nulo. Protein Boost is accredited by the Pet Sustainability Coalition; Nulo is not.

Nulo and Protein Boost compared

Nulo Protein Boost
Manufacturer Nulo, Inc. K9 Natural Foods Limited
Parent company Apax Partners KKR (Natural Pet Food Group)
Founded 2009 2006
Headquarters Austin, Texas, USA Christchurch, New Zealand
Products listed 291 13
Serves Cats & dogs Dogs
Price tier A relative price guide, from $ (most affordable) to $$$$$ (most premium), based on the brand's typical retail cost.
$$$$ $$$$
WSAVA guidelines The World Small Animal Veterinary Association (WSAVA) publishes criteria for evaluating a manufacturer: qualified nutritionists on staff, feeding trials, and published research. It does not certify or endorse brands.
No No
PSC accredited The Pet Sustainability Coalition is a nonprofit that accredits pet companies on their environmental and social impact, through third-party verification. It reflects sustainability practices, not food quality.
No Yes
Score The average KibbleLab score across this brand's scored foods, on a 0 to 10 scale. Foods are scored on published veterinary science, and no one can pay for a higher score. How scoring works .
8.3 (avg of 291) 8.6 (avg of 13)
Recalls on record KibbleLab began logging recalls in July 2026, so earlier recalls may not appear.
None None
Where to buy Amazon Amazon

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Nulo vs Protein Boost: how they compare

Scores

Protein Boost scores higher on KibbleLab, averaging 8.6 out of 10 across 13 scored foods, compared with 8.3 across 291 for Nulo. Scores apply the same criteria-based rubric to every food, drawn from published veterinary science, and no one can pay for a higher score.

Who makes them

Nulo is made by Nulo, Inc., owned by Apax Partners, based in Austin, Texas, USA, founded in 2009. Protein Boost is made by K9 Natural Foods Limited, owned by KKR (Natural Pet Food Group), based in Christchurch, New Zealand, founded in 2006.

Standards and range

Neither meets WSAVA's published manufacturer criteria. Protein Boost is accredited by the Pet Sustainability Coalition; Nulo is not. KibbleLab lists 291 Nulo foods and 13 Protein Boost foods.

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Common Questions

Which scores higher on KibbleLab, Nulo or Protein Boost?

Protein Boost scores higher: it averages 8.6 out of 10 across 13 scored foods, compared with 8.3 for Nulo. Scores reflect published veterinary science, and no one can pay for a higher score.

Who makes Nulo and Protein Boost?

Nulo is made by Nulo, Inc., which is owned by Apax Partners. Protein Boost is made by K9 Natural Foods Limited, which is owned by KKR (Natural Pet Food Group).

Which brand has more products on KibbleLab?

Nulo has 291 products in the KibbleLab database, compared with 13 for Protein Boost.

Where is each brand based?

Nulo is based in Austin, Texas, USA. Protein Boost is based in Christchurch, New Zealand.

Are Nulo or Protein Boost PSC Accredited?

Protein Boost is a PSC Accredited business. The Pet Sustainability Coalition is a nonprofit that Accredits pet companies on their environmental and social impact, through third-party verification.

Have Nulo or Protein Boost been recalled?

Neither Nulo nor Protein Boost has a recall on record in the KibbleLab database. KibbleLab began logging recalls in July 2026, so earlier recalls may not appear.

See the full profiles: Nulo and Protein Boost .

More comparisons

KibbleLab provides informational content only. This is not veterinary advice. Always consult a qualified veterinarian before changing your pet's diet.

This is a neutral, factual comparison, not a ranking or an endorsement of either brand. KibbleLab may earn affiliate commissions through links. No one can pay for placement or a higher score.

Brand and manufacturer details are compiled from public sources and not independently verified; they may not reflect contract manufacturing or co-packing. Recall data is compiled from public FDA and manufacturer notices, and a notice may name the parent company rather than the brand. KibbleLab began logging recalls in July 2026, so earlier recalls may not appear.

KibbleLab scores and commentary are editorial opinions based on published data. Represent one of these brands? Request a correction. Anyone else can email us. See our Terms.