You're looking for a gorge, and within that a little dugout where you'll see three dog bowls. Look at the pointers on the Pip-Boy map below. If you haven't discovered that location, you want to look directly west of Corvega Assembly Plant and south of Concord. The nearest spot to the armour is Rocky Narrows Park. However, it turns out there is some special armour for Dogmeat, you just need to know where to look and go fetch. But when it comes four-legged companions the options are pretty slim. You already know you can recruit companions in Fallout 4, hand them the weapons you find and even gift them some armour for protection. You're not the only one who needs protection.
