Ingredient file // Animal protein
Perch
A lean fish protein, not an omega-3 source
Perch is a lean freshwater fish that reaches kibble whole or as filleting leftovers. It supplies digestible animal protein and minerals but very little fat, so any omega-3 story belongs to oily fish such as salmon or herring.
- What it is
- Freshwater perch, either whole fish or the parts left after filleting, cooked into the food as an animal protein.
- Made from
- Lake-caught perch, whole or filleting leftovers
- Main job
- Lean animal protein
- Typical amount
- Not published
- Watch for
- Dogs with a diagnosed fish allergy
- Not the same as
- Ocean perch
Our read // In our catalog
In 1 of every 618 foods we track
Share of foods that list it
0%
4 of the 2,473 foods with an ingredient list on file, from 1 brand. All dry dog food.
Each square is 1% of the catalog
Where it sits on the label
Median position 6. In the top five of 1 food, so it is usually a supporting 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 3 priced foods, 192% 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 Carna4. 1 brand use it in total.
What it is
How it is made
Perch is a commercial lake fish sold mostly as fillets. Fillets take only 42 to 50% of a Nile perch, so heads, frames and skin pile up at the plant, and feed makers take part of that stream.3,4,10
- 01 // Source Lake-caught perch Freshwater perch from commercial lake fisheries. Only about 45% of a European perch is edible flesh.
- 02 // Process Filleted Fillets go to the human market. In Nile perch, the head alone is 23% of the fish and the frame another 10%.
- 03 // Process Meal or silage Leftovers become fishmeal, or fish silage for animal feed when shipping them to a meal plant does not pay.
- 04 // Output Perch in kibble Ground fish or meal is extruded, cooking it well past 145°F, the temperature CDC gives for killing fish tapeworm.
What is in it
Composition, dry matter
93
% protein
Raw perch fillet once the water is removed. It is nearly all protein, with little fat, so it adds protein but few calories from fat.
Why it is in the bag
What the manufacturer gets
-
01
Protein without much fat
Perch fillet is about 93% protein on a dry basis and only about 4% fat, so it raises the protein figure without adding much fat or energy.1
-
02
Digestible fish protein
In a 12-dog trial of extruded diets, the fish meal diet had the highest ileal protein digestibility, 87%, against 80% for poultry meal and 72% for lamb meal.6
-
03
Sells a filleting leftover
Fillets are under half of a Nile perch, and Lake Victoria plants were estimated to produce about 36,000 tonnes of solid waste a year. Feed turns that waste into income.4,5
How much No published trial has fed perch itself to dogs; the closest evidence is a 12-dog trial of an extruded diet built on fish meal.6
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
Fish protein is easy for dogs to digest
Evidence
- Strong
- Some
- Thin
- None
In a 12-dog trial of extruded diets matched for protein, the fish meal diet reached 87% ileal protein digestibility against 80% for poultry meal. The fish meal was not perch, and no trial has tested perch itself.6
-
Brands say
Fish is a gentle protein for allergic dogs
Outruns the evidence
Evidence
- Strong
- Some
- Thin
- None
Fish was the trigger in 5 of 297 dogs with proven food reactions, against 102 for beef. The authors note those counts could simply reflect what dogs were fed, and a recipe mixing perch with other meats is not an elimination diet.7
-
Brands say
Perch adds omega-3s for skin and coat
Outruns the evidence
Evidence
- Strong
- Some
- Thin
- None
Raw perch fillet carries about 0.25 g of EPA plus DHA per 100 g, roughly one-eighth of farmed salmon's 1.97 g. No study has tested perch for coat health. A real omega-3 dose comes from fish oil or oily fish.1,2
-
Owners say
Fish in dog food means a mercury risk
Outruns the evidence
Evidence
- Strong
- Some
- Thin
- None
FDA testing found freshwater perch averaged 0.150 ppm mercury across 19 samples, against 0.995 ppm for swordfish. FDA puts perch on its best choices list for pregnant women and young children.8,9
Straight answers
What owners ask
-
Q01
Is perch just filler?
NoIt is an animal protein, about 93% protein once dry. Even when it comes from filleting leftovers, heads and frames are fish flesh, bone and skin, which carry protein and minerals. Filler would have no job.1,4
-
Q02
Is it the same as ocean perch?
NoOcean perch is a saltwater fish that shares the market name. FDA tests the two separately: freshwater perch averaged 0.150 ppm mercury and ocean perch 0.121 ppm. Both sit on its lowest mercury list.8,9
-
Q03
Can I feed my dog raw perch?
Not rawCDC lists perch among the freshwater fish that carry the broad fish tapeworm. Cook it to 145°F, or freeze it at -4°F for 7 days. Salting or smoking does not kill the parasite. Kibble perch is already cooked.10
Who uses it
Brands, best sellers and the company it keeps
Top brands, by foods that list it
Usually listed with, share of the foods that list it
- Eggs 100%
- Ground Organic Sprouted Barley Seed 100%
- Herring 100%
- Sweet Potatoes 100%
- Salmon 75%
- Venison 25%
- Venison Liver 25%
- Goat 25%
- Goat Liver 25%
- Lamb 25%
- Lamb Liver 25%
- Ground Whole Brown Rice 25%
On the shelf
Foods that list it
4 foods in our reviews list it. Here are some of them.
Our read // On the bag
Count it as protein, look elsewhere for omega-3s
Perch on a label is a lean fish protein, listed by wet weight before cooking, so it shrinks once the water leaves. Judge the food by its protein on a dry matter basis, and check for fish oil or an oily fish if omega-3s matter to you. Perch alone will not supply them.
Sources
What we read
Checked October 1, 2026.
- 1 Fish, perch, mixed species, raw (FDC ID 173678)
- 2 Fish, salmon, Atlantic, farmed, raw (FDC ID 175167)
- 3 Perch, raw
- 4 A case study on high-value Nile perch products (in Proceedings of the symposium on post-harvest fish technology, CIFA Technical Paper 19)
- 5 Nile Perch Fish Processing Waste along Lake Victoria in East Africa: Auditing and Characterization
- 6 Protein and amino acid bioavailability of extruded dog food with protein meals of different quality using growing mink as a model
- 7 Critically appraised topic on adverse food reactions of companion animals (2): common food allergen sources in dogs and cats
- 8 Mercury Levels in Commercial Fish and Shellfish (1990-2012)
- 9 Advice about Eating Fish
- 10 About Diphyllobothrium (fish tapeworm)