When do coonhounds stop growing?

Most coonhounds will stop growing around two years old. They’ll reach their mature height around their first birthday but will continue to fill out and develop muscle mass until 18 to 24 months old. 

It’s advisable to switch them to adult food around the one-year mark, although this can vary depending on their specific growth rate and overall health. Milestone checkups with a vet are helpful during this period, as they can help ensure proper development, monitor growth patterns, and make personalized recommendations for diet transitions and care.