When to Switch From MoveGuard Growth to Adult | Pawganix

The Transition at a Glance

When to Transition — Growth Plate Closure by Breed Size

Growth plate closure timing varies significantly by breed size — and the variation matters because transitioning too early means months of growth-window joint formation without appropriate Growth formula support, while transitioning too late simply means continued Growth formula use beyond its target window (which carries no harm, but is not optimal).

Adult Weight Range	Typical Closure	Example Breeds	When to Transition
50–65 lb	16–18 months	Boxer, Weimaraner, Vizsla, GSP	After 18 months or vet confirmation
65–80 lb	18–22 months	Labrador, Golden, GSD, Doberman	After 20 months or vet confirmation
80–100 lb	20–24 months	Rottweiler, Cane Corso, Bullmastiff	After 22 months or OFA evaluation
100–130 lb	22–26 months	Bernese, Newfoundland, Saint Bernard	After 24 months or OFA evaluation
130–180+ lb	24–30+ months	Irish Wolfhound, Great Dane, Mastiff	After 26–30 months or OFA evaluation

The Signs That Tell You It's Time

Radiographic confirmation is the definitive signal — but most owners do not take routine X-rays at 18 months. In practice, the following provide strong indicators that transition is appropriate:

• OFA evaluation at 24 months — the gold standard. Your vet radiographically evaluates hip and elbow joint development; the images will show whether growth plates are closed. This is standard for any breed dog being evaluated for breeding, but it is useful for all large breed owners as a transition confirmation and adult joint baseline.
• Your vet confirms closure at a routine checkup — at the 18-month or 24-month appointment, asking your vet to assess growth plate status is a straightforward clinical question. Many vets can offer a clinical assessment without radiographs based on breed, age, and physical examination.
• Your dog has reached expected adult weight and held it for 60+ days — sustained stable adult weight is a practical proxy for completed growth in most large breeds. A dog still adding significant weight month-on-month has not finished growing.
• Your breed's typical closure age has been reached or exceeded — use the table above. If your Labrador is 22 months and has been at stable adult weight for three months, transition is appropriate even without radiographic confirmation.

Why Growth and Adult Are Different Formulas

MoveGuard Growth and MoveGuard Adult are not the same product in different packaging — they are genuinely different formulas built for different biological goals. Understanding the differences helps clarify why the transition matters and why both formulas exist.

The three structural differences that define the transition: glucosamine triples from 400mg to 1000mg (development-support dose → full adult therapeutic maintenance dose); Antarctic Krill Oil exits and Eggshell Membrane enters (growth-phase phospholipid EPA/DHA → adult collagen, elastin, and glycosaminoglycan structural support); and every dose steps up to match adult maintenance demands rather than growth co-factor demands. See the full breakdown: MoveGuard Growth vs MoveGuard Adult: Which Does Your Dog Need?

How to Make the Switch

Why You Should Continue After Graduation

The growth window closing does not mean joint health is secured permanently — it means the developmental phase is complete and the maintenance phase begins. Adult dogs — particularly large and giant breeds — face decades of mechanical joint loading, gradual cartilage wear, and increasing risk of conditions like CCL rupture, osteoarthritis, and spondylosis. The foundation built during the growth window is the best possible starting point; MoveGuard Adult is what preserves that foundation through adult and senior life.

The case for continued supplementation after graduation is strongest in:

• Athletically active breeds — working dogs, sporting dogs, dogs that run, hike, or swim regularly accumulate more cumulative joint loading than sedentary dogs. Higher activity means higher wear rate, higher maintenance demand.
• Breeds with adult joint risk — Dobermans (Wobbler Syndrome, CCL), Rottweilers (CCL rupture rate), German Shepherds (degenerative myelopathy and hip OA), Labrador Retrievers (high CCL and hip OA prevalence). The growth window closes but the genetic predispositions remain.
• Giant breeds — Irish Wolfhounds, Great Danes, and Saint Bernards have shorter average lifespans and faster rates of age-related joint degeneration than smaller breeds. Consistent adult supplementation from graduation onward is particularly well-supported in these breeds.
• Any dog whose owner wants to maintain what the growth window built — the nine actives in MoveGuard Growth and eight in Adult are not corrective — they are preventive and maintenance-focused. The longer a dog maintains good joint health, the less clinical intervention is required later.

Related Reading

• MoveGuard Growth vs MoveGuard Adult: Which Does Your Dog Need?
• When Should You Start Giving Your Puppy a Joint Supplement?
• What Is Canine Hip Dysplasia? Causes, Symptoms, Stages and Treatment
• 6 Best Joint Supplements for Adult Dogs Compared (2026)
• Do Joint Supplements for Dogs Actually Work? What the Evidence Shows
• Joint Supplement for Large Breed Puppies: What to Look For in 2026

* These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease. Growth plate closure ages in this article are typical ranges — individual dogs vary. Always consult your veterinarian for confirmation of your dog's growth plate status before transitioning supplements.