What's actually in your pet's bowl?

What is BARC?

BARC — Biologically Appropriate, Residually Corrected — is a framework for cats and dogs pioneered by Growlrr, with NRC 2006 as the nutrient baseline and two precedents — BARF (Biologically Appropriate Raw Food; veterinarian Dr. Ian Billinghurst, Give Your Dog a Bone, 1993) and BalanceIT (UC Davis veterinary nutritionist Dr. Sean Delaney, DVM/MS).

An appropriate daily meal for a cat or a dog clears three numerical constraints — animal-derived energy (dog ≥85% / cat ≥95% of kcal), protein-to-fat by energy (0.8–1.6), and fibre (dog ≤5% / cat ≤2.5% of dry matter). The Growlrr BowlBalancer™ sachet then closes any micronutrient gaps it leaves (calcium, thiamine, iodine, EPA/DHA…) to make it complete. No bones, no raw: the sachet supplies the calcium a boneless bowl lacks — and the vitamins and trace minerals that cooking heat would otherwise destroy — without the biological hazards of raw feeding.

Those axes rest on Growlrr's four founding principles:

1. Diversity over the mono-diet. Animals evolved on varied prey, not a single protein. A mixed base — chicken, mutton, fish, egg — beats a one-ingredient mono-diet, and rotating proteins spreads both the nutrients and the risk of any one gap.
2. Nutrition is not a cliff. A nutrient requirement is met over time, not at every single meal — a healthy body carries reserves and buffers day to day. That's biology, not a loophole, and we hold the diet to it on both sides: it's validated across a million simulated bowls so everyday variation never opens a gap, and across months of intake so nothing quietly runs short or builds past a safe limit. You're freed from razor's-edge kitchen precision because the system is proven to hold over the long run — not because "close enough" is fine.
3. Healthy animals self-regulate. A healthy adult handles a few extra kcal on its own. We don't count every calorie or measure every cut in the kitchen to industrial-scale targets; we set sane kitchen targets and let a normal metabolism do the rest.
4. Activity is the norm. A normal animal moves every day. We assume real activity in the energy model and put playtime ahead of calorie-counting — the fix for a heavy pet is usually the walk, not the crash diet.

Those three axes plus these four principles are what make a bowl BARC. Study the full framework — boundaries, citations & provenance →