Ingredient file // Animal protein
Goat Lungs
A lean organ protein US rules keep off plates
Goat lung is the lung tissue of slaughtered goats, a by-product US rules keep off human plates. In a wet food it adds lean animal protein of good quality, though no dog trial has tested it directly.
Role in the food Supporting nutrient- What it is
- The lungs of slaughtered goats, a soft organ by-product that US rules keep out of human food.
- Made from
- Lungs from inspected, slaughtered goats
- Main job
- Lean animal protein
- Typical amount
- Not published
- Watch for
- Dogs already allergic to beef or lamb
- Not the same as
- Goat meat
Straight answer
Is Goat Lungs safe for dogs?
Read it as protein, then look above it
Goat lung behind goat meat in a wet food is ordinary and fine: lean protein from the same animal. It does not make the food special, and it is not filler. If your dog reacts to beef or lamb, treat goat as untested and plan any switch as an elimination trial.
- Why it is in the food
- Lean animal protein
- How common
- Listed by 1 of the 3,204 foods we track
Our read // In our catalog
In 1 of every 3,204 foods we track
Share of foods that list it
<1%
1 of the 3,204 foods with an ingredient list on file, from 1 brand. All wet dog food.
Each square is 1% of the catalog
Where it sits on the label
Median position 3. In the top five of 1 food, so it is usually a main ingredient.
Above the salt
Almost always listed before the salt, so there is more of it than a pinch.
Price per lb
Median of the cheapest bag price across 1 priced foods, 24% above the catalog. The price is the food's, not the ingredient's.
Who leans on it
100%
of the foods that list it are from Zignature. 1 brand use it in total.
What it is
How it is made
Goat slaughter yields meat plus a long list of by-products. Federal rules bar livestock lungs from human food, so lungs that pass inspection go to pet food, drug makers or disposal.1,3
- 01 // Source Slaughtered goats By-products make up about 15 to 20% of the live weight of goats and sheep, and the lungs are one of them.
- 02 // Process Inspected Lungs showing disease, pathology or chemical residues are condemned and may not go into pet food.
- 03 // Process Diverted from food Clean lungs cannot be sold for people, so they are released for pet food, pharmaceutical use or disposal.
- 04 // Output Raw goat lung A soft, wet organ about 80% water, ground into wet recipes alongside goat meat and other organs.
What is in it
Composition, as fed
17
% protein
Protein in raw goat lung as fed. Take away the 80% water and roughly 80% of what remains is protein, with little fat.
Shown as fed because lung goes into wet food raw. The source prints goat protein with an apparent typo, so we show its low end; sheep lung tracks closely at 16.1 to 16.7% protein.1
Why it is in the bag
Real lean protein; how much depends on list position
- Main nutrition
- Supporting nutrient
- Does a job
- Mostly filler
Raw goat lung is about 17% protein and only 2 to 3% fat, so it adds lean animal protein. Labels list ingredients from most to least by weight. If lung sits just behind goat meat, it is likely a major protein source. Lower down, it backs up the meat. Makers also use it because US rules bar lungs from human food but allow them in pet food, so more of each goat gets sold.1,3,5
-
01
An outlet for a banned part
US rules bar livestock lungs from human food. Clean lungs can still go to pet food or pharmaceutical use, so a goat recipe gives the part a home.3
-
02
Protein without much fat
At about 17% protein and 2 to 3% fat as fed, lung raises the protein of a wet recipe while adding little fat or energy.1
-
03
Uses more of the animal
By-products make up about 15 to 20% of the live weight of goats and sheep. Folding lung and liver into a goat recipe sells more of each animal.1
How much No source publishes how much lung a recipe holds; the label only shows it weighs less, before cooking, than each ingredient listed above it.5
Our read // The claims
What the evidence supports
Strong: controlled studies in dogs agree. Some: small or mixed dog data. Thin: mechanism or lab work only. None: nothing, or the evidence points the other way.
-
Brands say
Lungs are a lean, high-protein meat
Evidence
- Strong
- Some
- Thin
- None
This is arithmetic from composition data. Raw goat lung is about 17% protein and 2 to 3% fat, with 79 to 80% water. On a dry basis that is roughly 80% protein. Lean, yes, but as wet as muscle meat.1
-
Brands say
Lung protein is high quality
Evidence
- Strong
- Some
- Thin
- None
In chick and rooster assays of 9 by-product meals, pork lungs gave the best protein efficiency, and raw meals including beef and sheep lungs digested at 93.6 to 96.7% for essential amino acids. Neither goat lung nor dogs were tested.2
-
Brands say
Goat is a novel protein for allergic dogs
Outruns the evidence
Evidence
- Strong
- Some
- Thin
- None
Goat is absent from a review of 297 food-allergic dogs, which likely reflects little exposure, not proven safety. In a 10-dog study, beef and lamb allergy shared the same proteins, and goat is a close ruminant relative. No study has tested goat.6,7
-
Critics say
Lungs are unfit for people, so they are junk
Outruns the evidence
Evidence
- Strong
- Some
- Thin
- None
The US human food ban rests on 1969 USDA studies that found dust, pollen, spores and rumen contents in airways. Diseased lungs are condemned for pet food too, and pork lung scored highest for protein efficiency in chick assays.2,3,4
Straight answers
What owners ask
-
Q01
Is it just filler?
NoRoughly 80% of lung's dry weight is protein, and pork lung scored highest for protein efficiency in chick assays of by-product meals. It is a real protein ingredient, not a bulking agent.1,2
-
Q02
Why can't people buy lungs in the US?
A federal ruleA USDA rule bars livestock lungs from human food, based on 1969 studies that found dust, spores, pollen and rumen contents in airways. A 2023 petition asked USDA to lift it.3,4
-
Q03
Is goat lung the same as goat?
NoOn a label, goat means muscle meat. Lungs fall under meat by-products, so a recipe naming goat lungs is telling you exactly which organ went in, which is more than a generic by-product line does.5
Who uses it
Brands, best sellers and the company it keeps
Top brands, by foods that list it
Foods that list it / all the brand's recipes we track.
Usually listed with, share of the foods that list it
- Goat 100%
- Water 100%
- Goat Liver 100%
- Peas 100%
- Tricalcium Phosphate 100%
- Chickpeas 100%
- Agar-Agar 100%
- Sunflower Oil 100%
- Salt 100%
On the shelf
Foods that list Goat Lungs
1 food in our catalog lists it, highest on the label first.
Sources
What we read
Checked October 1, 2026.
- 1 Valuation of Goat and Sheep By-Products: Challenges and Opportunities for Their Use
- 2 Protein quality of various raw and rendered by-product meals commonly incorporated into companion animal diets
- 3 9 CFR 310.16 Disposition of lungs
- 4 Would you like some lungs with that?
- 5 What's in the Ingredients List?
- 6 Critically appraised topic on adverse food reactions of companion animals (2): common food allergen sources in dogs and cats
- 7 Identification of allergens responsible for canine cutaneous adverse food reactions to lamb, beef and cow's milk