Written for owners who do the math. What the studies actually show about ingredients, supplements, and senior dog nutrition.
Shellfish-derived glucosamine and heavy fillers can wreck a sensitive senior gut. Here's why it happens, and why a shellfish-free, hydrolyzed-collagen chew tends to sit easier.
Senior Dog GuideMost vets call dogs senior at age 7, but the signs arrive earlier and subtler than owners expect. Here's what to look for, and what to do once you notice.
IngredientsSix research-supported ingredients, the doses studies use, and the typical label doses you'll see on store shelves. Spoiler: the gap is often 10 to 30 times.
ResearchTwo failure modes, the glucosamine evidence story, and the caregiver placebo effect. How to evaluate a joint supplement before buying.
NutritionA year-by-year guide to senior dog nutrition. What changes at each phase, what to add, and the common feeding mistakes that quietly compound.
ScienceThe dose, the type, the timeline, the sourcing. Everything published research says about hydrolyzed collagen and senior dog joint health.
Marrow is a once-daily chew for senior dogs, formulated with six ingredients at the doses research actually uses. Launching August 2026.