Should I give my dog a multivitamin?

If your dog eats a complete, AAFCO-approved commercial food, additional multivitamins are unnecessary and could cause harmful excesses of fat-soluble vitamins. Multivitamins are essential for dogs on homemade diets. Consult your vet before supplementing.

Can dogs eat liver for vitamins?

Yes, liver is one of the most nutrient-dense foods for dogs, rich in vitamin A, B vitamins, and iron. Feed in moderation — liver should make up no more than 5% of the total diet. Too much liver can cause vitamin A toxicity, especially from beef liver.

Do dogs need vitamin C?

Dogs produce their own vitamin C, unlike humans. Supplementation is generally unnecessary for healthy dogs. However, some vets recommend vitamin C for dogs under stress, senior dogs, or dogs with certain health conditions as an antioxidant support.

Essential Vitamins for Dogs: A Complete Nutritional Guide

Complete guide to essential vitamins for dogs. Fat-soluble and water-soluble vitamins, daily requirements, natural food sources, and signs of deficiency.

Requirement: Varies by vitamin — complete commercial foods meet AAFCO minimums

Why Vitamins Matters

Dogs require 13 essential vitamins for proper metabolic function, divided into fat-soluble (A, D, E, K) which are stored in body fat and liver, and water-soluble (B-complex, C) which need regular replenishment. A balanced commercial diet typically provides all necessary vitamins.

Benefits

✓Vitamin A: Vision, immune function, cell growth

✓B vitamins: Energy metabolism, nervous system

✓Vitamin C: Antioxidant, immune support (dogs produce their own)

✓Vitamin D: Calcium absorption, bone health

✓Vitamin E: Cell protection, immune function

✓Vitamin K: Blood clotting, bone metabolism

Best Food Sources

Liver (vitamin A, B vitamins, iron)

Fish and fish oil (vitamin D, omega-3s)

Eggs (B vitamins, vitamin D)

Sweet potatoes (beta-carotene/vitamin A)

Blueberries (vitamin C, antioxidants)

Spinach and kale (vitamin K, folate)

Sunflower seeds (vitamin E)

Requirements by Life Stage

Life Stage	Requirement	Notes
Puppies	Higher across all vitamins	Growing dogs need more vitamins for development. Puppy formulas are enriched
Adult (maintenance)	AAFCO minimum levels	Complete commercial food provides adequate vitamins
Senior dogs	May benefit from additional antioxidants	Vitamins E, C, and B-complex support aging
Homemade diet	Must supplement	Homemade diets ALWAYS require a vitamin/mineral supplement

Signs of Deficiency & Excess

Deficiency Signs

⚠Vitamin A: Night blindness, poor coat, skin lesions
⚠B vitamins: Anemia, lethargy, neurological issues
⚠Vitamin D: Weak bones, rickets, poor growth
⚠Vitamin E: Muscle weakness, reproductive issues
⚠General: Poor growth, weak immune system, lethargy

Excess Signs

✕Vitamin A toxicity: Joint pain, bone abnormalities
✕Vitamin D toxicity: Kidney damage, calcification of soft tissues
✕Fat-soluble vitamins accumulate — toxicity is possible
✕Water-soluble vitamins are excreted — toxicity rare

Other Nutrition Guides

protein fat fiber calcium omega 3 water phosphorus

Frequently Asked Questions

Feeding Guidelines Disclaimer

The feeding recommendations on DosageGuide.com are estimates based on standard veterinary nutrition formulas (RER = 70 × weight^0.75) and general guidelines from AAFCO and veterinary nutrition resources.

Every dog is unique. Actual calorie needs vary based on breed, metabolism, activity level, health conditions, spay/neuter status, and the specific food brand you use. Always consult your veterinarian for personalized feeding advice.

These guides are for general reference and do not replace professional veterinary guidance. Adjust portions based on your dog's body condition score and weight trends.