Best Supplements for Dogs by Age, Including Senior Dogs

Dog Supplements Guide

Which supplements make sense for your dog by age and goal, the best supplements for senior dogs, what "natural" really means on a label, and how to avoid buying four bottles you don't need.

Quick answer

Choose dog supplements by goal: probiotics for digestion, glucosamine with chondroitin and MSM for joints, and salmon oil with biotin and zinc for skin and coat. Senior dogs often benefit from a combination. Puppies on a complete diet usually don't need supplements unless your vet recommends one.

What Supplements Should I Give My Dog? Start With the Goal

The best supplements for dogs depend on what you're trying to support. Start with the goal, then match the ingredient:

Goal Key ingredients Read more
Digestion & stool quality Probiotics, prebiotics (inulin), pumpkin, digestive enzymes Probiotics for dogs
Hips & joints Glucosamine, chondroitin, MSM, green-lipped mussel Glucosamine for dogs
Skin & coat Salmon or fish oil (omega-3s), biotin, zinc, vitamin E Salmon oil section below
Vitamins & minerals Vitamins A, D3, E, B complex; zinc, selenium What vitamins dogs need
Antioxidant support Vitamins C and E, selenium, astaxanthin, turmeric Covered below
Health problems come first. Supplements support everyday wellness. Ongoing digestive trouble, limping, hair loss, itching or heart concerns need a veterinarian's diagnosis before you add anything.

Dog Supplements by Age

Puppies (under 12 months)

Puppies on a complete puppy food generally don't need supplements, and extra minerals can interfere with healthy growth in large breeds. Only add a supplement if your veterinarian recommends one.

Adult dogs

Healthy adults on a good diet don't need much. Owners typically add one or two targeted supplements: a probiotic for a sensitive stomach, omega-3s for skin and coat, or early joint support for large or very active breeds.

Senior dogs

This is where supplements are most commonly used, because older dogs often need support in several areas at once.

Best Supplements for Senior Dogs

Supplements for older dogs usually focus on four areas:

Joints & mobilityGlucosamine, chondroitin and MSM to support comfort, flexibility and getting up after naps.
DigestionProbiotics and fiber, since digestion often becomes less predictable with age.
Skin & coatOmega-3s, biotin and zinc for coats that turn dull or dry.
AntioxidantsVitamins C and E, selenium and astaxanthin for daily wellness.

Senior dogs are also the most likely to be on medication, so check every new supplement with your veterinarian. Choose a soft chew that's easy for older teeth, and avoid stacking several products that repeat the same ingredients.

Joints, gut, skin & coat in one chew250 mg glucosamine, 1 billion CFU probiotics, wild salmon oil and antioxidants. Soft and easy for senior dogs to chew.
Shop the 23-in-1

Salmon Oil and Fish Oil for Dogs

Salmon oil and fish oil supply omega-3 fatty acids (EPA and DHA), among the most widely used supplements for dogs. Owners use them to support healthy skin, a shiny coat and joint comfort.

  • Liquid salmon oil delivers the most omega-3 per serving, but it can be messy and can go rancid once opened.
  • Soft chews with salmon oil powder are easier to give and store, and pair omega-3s with other nutrients.
  • Too much fish oil can cause loose stool. Start low and follow the label.

Each LaserGlow Pets chew includes 120 mg wild salmon oil powder alongside biotin, zinc and vitamin E for skin and coat. If your vet recommends high-dose omega-3s for a specific condition, a dedicated fish oil product is the better fit.

Are "Natural" Dog Supplements Better?

"Natural" isn't a regulated term on pet supplement labels. Many effective ingredients come from whole-food sources, such as pumpkin, salmon oil, green-lipped mussel, turmeric and colostrum, but the word alone doesn't tell you how much of each is inside. Judge any natural dog supplement the same way: listed amounts, a clear inactive-ingredient list and no xylitol or artificial colors.

How to Choose Dog Supplements Without Overbuying

  1. Pick one or two goals. Don't buy for every benefit on the shelf.
  2. Read the milligrams. Skip proprietary blends that hide the amounts.
  3. Check for overlap. A joint chew and a multivitamin may both contain glucosamine. Count the totals.
  4. Consider one combined product. If you want gut, joint and coat support, one all-in-one chew is simpler and often cheaper than four bottles.
  5. Look at inactive ingredients. No xylitol, no artificial colors.
  6. Commit for 6–8 weeks. Most supplements take consistent daily use to judge.

Dog Supplements FAQs

What supplements should I give my dog?

Start with the goal: probiotics for digestion, glucosamine with chondroitin and MSM for joints, and salmon oil with biotin and zinc for skin and coat. Ask your veterinarian if your dog has a health condition or takes medication.

What are the best supplements for senior dogs?

Senior dogs most often benefit from joint support (glucosamine, chondroitin, MSM), digestive support (probiotics and fiber), omega-3s for skin and coat, and antioxidants. Check new supplements with your vet, since many senior dogs take medication.

Do puppies need supplements?

Usually not. Puppies on a complete puppy food get what they need, and extra minerals can affect growth in large breeds. Only supplement a puppy on your veterinarian's advice.

Is salmon oil good for dogs?

Salmon oil is a common source of omega-3 fatty acids used to support skin, coat and joint comfort. Follow label amounts, since too much can cause loose stool.

Are natural dog supplements better?

"Natural" isn't a regulated label term. Judge any supplement by listed amounts, a clear ingredient list and no xylitol or artificial colors.

Can I give my dog multiple supplements?

You can, but check for overlapping ingredients like glucosamine or vitamins, and review the combination with your veterinarian. An all-in-one chew can reduce overlap.

What does LaserGlow Pets include?

Each 23-in-1 soft chew includes 1 billion CFU probiotics, 250 mg glucosamine, chondroitin, MSM, 120 mg wild salmon oil powder, biotin, zinc and 11 vitamins and minerals, with every amount listed on the label.

This article is for general education and isn't veterinary advice. These statements have not been evaluated by the FDA. LaserGlow Pets products are not intended to diagnose, treat, cure or prevent any disease. Talk with your veterinarian about your dog's specific needs.