Go Back

Tuna & Oat Crunch Dog Biscuits – Savory, Protein-Rich Crunch with Gentle Fiber

These crunchy biscuits deliver a savory protein boost using tuna paired with digestion-friendly oats. Tuna (packed in water, no salt) provides lean protein and omega-3s that support skin, coat, and brain health, while oats contribute soluble fiber for steady energy and gut comfort. Baked to a firm crunch, these biscuits are ideal for dogs who love bold flavors without heavy fats or additives.

Ingredients
  

  • 1 can tuna in water no salt added, drained very well
  • 1 egg
  • cups oat flour or rolled oats blended into flour
  • 2 –4 tablespoons water as needed to bind
  • Optional: 1 tablespoon finely grated carrot for extra fiber and color

Equipment

  • Mixing bowl
  • Fork or food processor
  • Measuring cups
  • Baking sheet
  • Parchment paper or silicone baking mat
  • Rolling Pin
  • Cookie cutters or knife
  • Cooling rack

Method
 

Step 1: Preheat the oven.
  1. Set oven to 350°F (175°C) and line a baking sheet with parchment.
Step 2: Prepare the tuna.
  1. Flake the drained tuna finely with a fork (or pulse briefly in a processor).
Step 3: Mix the base.
  1. In a bowl, combine tuna and egg until evenly blended.
Step 4: Add flour gradually.
  1. Stir in oat flour until a firm dough forms. Add water a tablespoon at a time if the dough feels dry.
Step 5: Roll and cut.
  1. Roll dough to about ¼-inch thickness. Cut into biscuit shapes or small squares.
Step 6: Bake until crunchy.
  1. Bake for 22–26 minutes, until biscuits are firm and lightly golden.
Step 7: Cool completely.
  1. Transfer to a cooling rack. Biscuits will crisp further as they cool.

Notes

Storage ❄️:
Room temperature: up to 5 days in an airtight container ❄️
Refrigerator: up to 2 weeks ❄️
Freezer: up to 3 months ❄️
Ensure biscuits are fully cooled before storing to maintain crunch.
⚕️ Nutritional Notes (macros or benefits)
Tuna: Lean protein, omega-3 fatty acids for skin/coat and cognitive support
Oats: Soluble fiber for digestion and steady energy
Egg: Complete protein and natural binder
These biscuits are savory, low-fat, and fiber-balanced.
🥄 Variations (dog-safe only)
Tuna & Pumpkin Crunch: Replace 2 tablespoons water with pumpkin purée
Extra-Crispy Version: Bake an additional 5–7 minutes
Mini Training Crunch: Cut into tiny squares
Grain-Free Option: Use coconut flour (start with ⅓ cup; very absorbent)
Tuna & Parsley Fresh Crunch: Add 1 teaspoon finely chopped parsley
❓ 10 FAQs
Is tuna safe for dogs?
Yes—in moderation, packed in water with no salt added.
Can dogs eat tuna treats often?
Occasionally is best; rotate proteins.
Why drain tuna well?
Excess moisture affects dough and storage.
Are these biscuits hard?
Crunchy, not rock-hard.
Can puppies eat these?
Yes—break into small pieces.
Can I use canned salmon instead?
Yes—no salt added and bones removed.
Do these smell fishy?
Mildly—dogs love the aroma.
Can I air-fry them?
Yes—325°F for 8–10 minutes, checking crispness.
Is oat flour better than wheat?
Oats are gentler for many dogs.
How do I keep them crunchy longer?
Cool fully and store airtight.
🏁 Conclusion
Tuna & Oat Crunch Dog Biscuits are a flavorful, protein-rich treat made with simple, dog-safe ingredients. With satisfying crunch, gentle fiber, and freezer-friendly storage, these biscuits are perfect for savory snack lovers and everyday rewarding. Easy to bake and loved by dogs—an excellent addition to your homemade treat rotation.