You don't need a garden to tire out a high-energy dog. Here are five indoor activities that work: hide treats around a room for a DIY sniff hunt, freeze a lick mat for a slow, focused chew, use a puzzle feeder instead of a bowl at mealtime, teach one new trick per week to build focus, and rotate toys weekly so nothing gets boring.
Fifteen minutes of focused sniffing or problem-solving can tire a dog out as much as an hour-long walk. It's not about more space — it's about more brain work.