
Why Freeze-Dried Whole Herring is a Superfood for Pet Rat
- Reno Rats

- Aug 6
- 2 min read
When it comes to feeding pet rats, most people stick to the basics: lab blocks, fruits, veggies, and the occasional treat. But there’s one often-overlooked powerhouse that deserves a spot in your rat’s diet — freeze-dried whole herring.
🐟 A Natural, Nutrient-Dense Treat
Freeze-dried whole herring is packed with omega-3 fatty acids, which support healthy skin, coat, brain function, and heart health. These essential fatty acids can help improve coat shine, reduce inflammation, and even support immune function — especially important for rats prone to respiratory or chronic conditions.
Whole herring also provides:
High-quality protein – essential for growth, muscle development, and tissue repair
Natural calcium and phosphorus – thanks to the tiny, digestible bones, which help support strong teeth, bones, and proper muscle function
Vitamin D and B12 – for immune support, nerve function, and energy
Selenium and iodine – essential for thyroid balance and metabolic health
🐁 Especially Beneficial for Breeding Does
Pregnant and lactating females have elevated nutritional needs, particularly for calcium and phosphorus to support fetal development and milk production. The soft, whole bones in freeze-dried herring offer a bioavailable source of minerals, which can help:
Prevent calcium deficiency during high-demand periods
Support healthy litter development
Maintain bone density and energy levels in the mother
Feeding whole fish as a supplement during breeding and nursing can give your females the boost they need without resorting to synthetic vitamins or processed additives.
🧠 Brain-Boosting Benefits
Because rats are such intelligent, emotionally driven creatures, offering nutrient-rich foods like herring can also support neurological development and cognition — especially important during adolescence and senior life stages.
🐭 A Species-Appropriate Snack
While rats are often considered herbivores by mistake, they are actually opportunistic omnivores in the wild. This means small amounts of animal protein — like insects or fish — mimic their natural diet more closely than processed treats. Whole, single-ingredient options like herring allow you to offer enrichment through feeding while staying biologically appropriate.
💡 Feeding Tips
Offer 1–2 small herring pieces per rat, 1–2x per week
Use them as high-value treats during training or bonding
Break them into smaller bits for younger rats or those new to fish
For pregnant or lactating does, offer slightly more during late pregnancy and peak nursing
As with all protein sources, moderation is key — but don’t be afraid to include freeze-dried whole herring as a healthy, functional treat your rats will love.






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