Go by current weight, and if your dog sits right on a boundary, choose the lower band and contact us. The bands are Mini under 11 lb, Small 11 to 22 lb, Medium 23 to 54 lb, Large 55 to 77 lb, and X-Large over 77 lb. If your dog's weight changes on the plan, email us and we will move your subscription to the right size at no charge.

Cellular aging starts long before you can see it, which is the argument for starting earlier rather than later. General guidance is 3 to 5 years for large breeds and 5 to 7 years for small breeds, since larger dogs age faster. Leap Years is not for dogs under 3 years old. If your dog is already showing age-related changes, that is not too late either. The clinical trial was conducted in dogs aged 10 and over.

Many pet parents report noticing changes in alertness, activity, or engagement within 30 to 90 days, and in older dogs it is sometimes sooner. Ninety days is the honest benchmark, because that is the window the clinical trial measured. Benefits are tied to consistent daily use, so the routine matters more than the calendar.

Chews are manufactured in the USA with globally sourced raw materials. All raw materials are produced and tested in FDA-registered facilities that are audited both by federal agencies and by Animal Biosciences. Finished chews are GMP certified and tested in a registered laboratory to confirm they meet label claims and are free of impurities.

It is a soft chew with a non-animal beef flavor, and most dogs take it the way they would take a treat rather than a pill. If your dog will not eat it, that is exactly what the 30-day guarantee is for.

The clinical trial found no significant difference in adverse events between the treatment and placebo groups. Fewer than 1% of dogs experience transient digestive upset after the golden chew, which can include reduced appetite, soft or dark stools, gas, vomiting, or diarrhea. If your dog has a medical condition or takes medication, talk to your veterinarian before starting.

From your account, in two clicks, at any time. Skip a month, change your dog's size, change the delivery date, or cancel outright. No phone call, no retention script, no cancellation fee.

Because individual circumstances vary, talk to your veterinarian before combining Leap Years with medication or with a dog who has an existing medical condition. Your vet is welcome to contact us, and we will send the published study.

Leap Years is a supplement, not a drug. These statements have not been evaluated by the Food and Drug Administration, and this product is not intended to diagnose, treat, cure, or prevent any disease. What we can say is that it was formulated by veterinarians, manufactured in FDA-registered, GMP-certified facilities, and tested in a placebo-controlled clinical trial whose results are published and available for your veterinarian to read.