Nulo Challenger Puppy & Adult Alpine Ranch Beef, Lamb & Pork Dry Dog Food, 4.5-lb bag

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At a Glance

  • No Corn No Wheat No Soy
  • High-Protein
  • Vitamins & Minerals
  • Hip & Joint Support
  • Immune Support
  • Made in USA
  • All Lifestages
  • All Breeds

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$28.99 Chewy Price
($6.45 /lb)
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About This Item

Details

  • This grain-inclusive kibble features 32–35% protein—plus, 83–90% of this protein is animal-based for the meaty nutrition your dog craves.
  • Amino acids from protein promote lean muscles and a strong, healthy heart.
  • Made with low-glycemic, organic ancient grains like oats, barley, and millet.
  • Supports a strong immune system with wholesome fruits, vegetables, and vitamins C and E.
  • Provides a balanced source of omega-3 and -6 fatty acids to nourish the skin and coat.

Ingredient Information

Feeding Instructions

Learn More About Nulo From Our Team of Experts

Peak Nutrition, Powered by Purpose

The spirit of Challenger is reaching beyond conventionally grown ingredients and choosing sustainability. With ethically-sourced ingredients like beef, duck, haddock, and organic grains like millet, oats, and barley, we can enrich the way we feed our pets.

Nutrition Meets Sustainability

Challenger recipes use ethically-sourced proteins like beef, lamb, pork, haddock, salmon, duck, turkey, and guinea fowl. Organic ancient grains like millet, oats, and barley provide low-glycemic carbs while supporting sustainable agriculture.

Fueled by High Animal Protein

Nulo's Challenger line provides 32-35% protein content, with 83-90% derived from animal sources.  Each recipe features animal proteins as the top ingredients, ensuring a high-protein diet that supports lean muscle mass and overall health.

Nourish Health with Premium Ingredients

Advanced prebiotics and BC30 probiotics aid digestive and immune health. Ancient grains, ethically sourced proteins, miscanthus grass and superfoods fuel optimal nutrition. Vitamins and omegas nourish immunity, skin, and coat.

About Nulo

Nulo was founded on the principle that our pets are at their best when they are fueled with the right selection of ingredients—functional, delicious, and nutritious. That’s why some of the best athletes in the world choose Nulo for their best friends.

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Questions & Answers

1 Customer Questions

Why are large puppies only allowed to use as supplemental or intermittent feeding yet every one else (adults or small/medium puppies) can eat?

Answer by Chewy • Mar 08, 2025
This food is not formulated to meet the guidelines of the AAFCO for large breed puppies (70 pounds or more as an adult). Large breed puppies have different nutritional requirements than smaller breeds.
Reviews
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4.5
Rated 4.5 out of 5 stars
64 Ratings
Terms & Conditions

Customers Mention

Chewy identifies key considerations with the help of artificial intelligence and our veterinarians.

Digestibility

80% Positive

Ingredients

72% Positive

Nutritional Value

79% Positive

Palatability

76% Positive

28 Customer Reviews

Rated 5 out of 5 stars
By Hannah on Nov 5, 2025

He loves it!

We’ve switched to Nulo challenger from Farmina due to some allergies my 7 year old dog was having and we have loved Nulo so far! His itchiness has stopped and we

We’ve switched to Nulo challenger from Farmina due to some allergies my 7 year old dog was having and we have loved Nulo so far! His itchiness has stopped and we rotate through the 3 bags to give him some variety!

Rated 5 out of 5 stars
By Susan on Oct 15, 2025

No more picky-eater

Not quite a year old Bonnie quit eating full meals - had us really worried - changing to this food totally restored a healthy appetite

Not quite a year old Bonnie quit eating full meals - had us really worried - changing to this food totally restored a healthy appetite

Rated 1 out of 5 stars
By Virginia on Jun 17, 2025

Read ingredients...

We can't be the only people with a dog that's allergic to chicken and or poultry. This BEEF option (all of their opinions of food pork n so on) has some of the main

We can't be the only people with a dog that's allergic to chicken and or poultry. This BEEF option (all of their opinions of food pork n so on) has some of the main ingredients that are CHICKEN AND TURKEY. Super garbage, if I wanted to buy chicken or turkey dog food I would of pick the bag that says chicken or turkey...just so frustrating when advertised as BEEF you would expect the makers if the food to only add beef ingredients. Super disappointing, and if they do that for profit, what else do they do to the food for the "cheaper ingredients" to make more money. This was just so easy to see (after i got home)that they used chicken and turkey that is cheaper than beef so add that people will buy it because they don't usually look at all the ingredients... I bought it because I trusted the name. Got home sat down and actually read the ingredients. Nulo you are pretty tricky I believed you sold a beef dog food which it is NOT.

Rated 5 out of 5 stars
By Ronda on Jul 30, 2025

Love that it has organic grains!

Purchased this for my three dogs after searching for ”organic” dog food. While this is not labeled as organic, it does have organic grains, no potatoes and high

Purchased this for my three dogs after searching for ”organic” dog food. While this is not labeled as organic, it does have organic grains, no potatoes and high quality meats. All which are very important to me. Dogs love it too!

Rated 4 out of 5 stars
By cindy on Mar 24, 2025

Thought my dogs would like this since they like beef

Neither of my dogs would eat this. Have no idea what’s making them not like it. I then tried to put some warm water on it to enhance the flavor that did not work

Neither of my dogs would eat this. Have no idea what’s making them not like it. I then tried to put some warm water on it to enhance the flavor that did not work. I tried giving it to them as treats as well, but they sniffed and walked away from it. I have a bag full that I can’t use. I started out mixing it with there other food and they picked out the old food and left the beef. I found that odd something about it they don’t like. So it’s back to turkey.

Rated 1 out of 5 stars
By Michele on Mar 5, 2025

Not for large breed puppies

The TINEST note says this is not for large breed puppies. It’s literally fine for everything else, adults, small or medium breed puppies and of course I have a German

The TINEST note says this is not for large breed puppies. It’s literally fine for everything else, adults, small or medium breed puppies and of course I have a German shepherd and this is only ok for intermittent and supplemental feeding. Guess I’ll be donating this since he can’t eat it. They do have a large breed version but I’m not spending another 100. That really should have been made MUCH clearer. There’s literally a feeding guideline that says up to 100 lbs.

Rated 1 out of 5 stars
By Mathy on Mar 6, 2025

Contains Chicken

I did not purchase at Chewy's but wanted to alert people that Nulo misrepresents this food as Beef, Lamb & Pork but it also has Salmon, Turkey and Chicken Meal which

I did not purchase at Chewy's but wanted to alert people that Nulo misrepresents this food as Beef, Lamb & Pork but it also has Salmon, Turkey and Chicken Meal which I was specifically avoiding.

Rated 5 out of 5 stars
By Catana on Mar 26, 2025

Updated order arrived timely

Changes to my order were handled properly and I needed the order sooner than the subscription date. All was handled perfectly.

Changes to my order were handled properly and I needed the order sooner than the subscription date. All was handled perfectly.

Rated 5 out of 5 stars
By John on Oct 30, 2024
Received Free Product

It’s a great buy

Really impressed with nulo brand as a whole. The dog food must have been really good because I grave my small dog wet food and some dry food and she honestly scarfed

Really impressed with nulo brand as a whole. The dog food must have been really good because I grave my small dog wet food and some dry food and she honestly scarfed the dry food first which is usually not the case. I like that this food is a small enough kernel that I can feed it to both my small and large dogs, I love the ingredients, and the quality of the food. I especially loved the resealable bag, that velcro type reseal is amazing and more brands should use it, very easy to close which is not always the case. Overall this is a good purchase in my opinion.

Rated 5 out of 5 stars
By Jill on Oct 30, 2024
Received Free Product

My dogs enjoy eating this and I’m loving packaging

This bag of dog food offers just the right size of pieces for my large dogs! They seem to like the smell and taste! My favorite part is that the bag is easily

This bag of dog food offers just the right size of pieces for my large dogs! They seem to like the smell and taste! My favorite part is that the bag is easily resealable, with a strip of Velcro-like material that closes together with a gripping seal! Also, the bag is labeled, at the top opening, to recycle!