iHeartDogs is reader-supported. When you buy via links on our site, we may earn an affiliate commission at no extra cost to you.

As your senior Sheltie grows older, the right nutritional support can help them stay active, comfortable, and full of life. The best supplements for a senior Sheltie can promote joint health, cognitive function, digestion, immune support, and overall wellness during their golden years. This guide features top supplement choices to help you find the best option for your aging companion and support their changing needs with confidence.

Senior Shetland Sheepdog sitting on green grass outdoors

Best Senior Sheltie Supplements

1. Glucosamine & Chondroitin for Supporting Your Senior Sheltie’s Aging Joints

Joint pain and arthritis are some of the most common ailments an aging Sheltie will face. Supplements containing glucosamine help replace lost joint fluid, providing much-needed lubrication and cushioning to stiff, achy joints. Chondroitin sulfate has been shown to improve the structural integrity of joints by repairing damaged cartilage and preventing further cartilage breakdown.

iHeartDogs Hip and Joint Supplement for Dogs

View the glucosamine and chondroitin supplement iHeartDogs recommends →


2. Probiotics for Immune & Gut Support for Your Senior Sheltie

Probiotics are supplements containing large doses of microorganisms. They promote a healthy GI tract by allowing the “good” bacteria in the gut to flourish. “Bad” bacteria often accumulate due to stress, illness, and prolonged use of medications. Since the majority of your senior dog’s immune system is located in the gut, probiotics also help to maintain health throughout the body.

iHeartDogs Pupkin™ Probiotics, Prebiotics, & Postbiotics is a complete daily digestive supplement designed to support healthy digestion, firmer stools, and immune function. It combines 3 billion CFU of probiotics across four beneficial strains with prebiotics and postbiotics to help nourish beneficial gut bacteria and maintain a healthy intestinal environment. Pumpkin provides a natural source of fiber to help regulate bowel movements, while digestive enzymes promote better nutrient absorption. The formula also includes bone broth to help support the digestive tract and turkey tail mushrooms for additional immune support, making it an excellent daily choice for dogs with sensitive stomachs or aging digestive systems.

iHeartDogs Pupkin Probiotics Prebiotics and Postbiotics for Dogs

View Pupkin™ Probiotics, Prebiotics, & Postbiotics →


3. Honey Guard™ – Allergy & Itch Omega 3-6-9 Powder

As Sheltie dogs grow older, maintaining healthy skin and a soft, shiny coat can become an important part of their overall wellness routine. Honey Guard™ Allergy & Itch Omega 3-6-9 Powder is a great option for senior Shelties because it provides a blend of Omega 3, 6, and 9 fatty acids, including pure Antarctic krill oil, to support healthy skin and coat condition. It also helps maintain normal skin moisture and provides nutritional support for dogs that experience seasonal or environmental allergies. The convenient powder formula mixes easily into food, making it especially useful for senior dogs that may be picky eaters or have difficulty chewing supplements.

This supplement fits well into a daily health plan for an aging Sheltie by offering targeted skin and coat support alongside a balanced diet and regular veterinary care. Every purchase also helps feed shelter dogs, making it a choice that benefits dogs beyond your own companion.

iHeartDogs Honey Guard Allergy & Itch Omega 3-6-9 Powder

View on Amazon | View on iHeartDogs


4. Milk Thistle for Liver & Kidney Support, Especially for Dogs Taking Pain Medications

Natural milk thistle is said to protect the liver from damage and may actually improve liver function. This is important for aging Shelties, especially those with existing liver problems and those taking medications known to be taxing on the liver. For example, any dog regularly taking an NSAID pain medication — such as carprofen (Novox, Rimadyl), deracoxib (Deramaxx), firocoxib (Previcox), meloxicam (Metacam), grapipant (Galliprant) — may need additional liver support. Make sure to discuss this with your vet before adding milk thistle to your Sheltie’s routine.