When do Icelandic Sheepdogs stop growing?

Icelandic Sheepdogs typically stop growing at 12 months old. Most of their height growth occurs by the time they’re about nine months, but they continue to fill out and develop muscle until they reach full maturity around their first birthday. 

Once they reach their full height, you can start transitioning them to adult dog food to support their long-term health as their nutritional needs shift towards a lower-calorie and protein-dense diet.