When choosing a feed for hard keepers, the most important factor is calorie density. Hard keepers have high metabolisms or struggle to maintain weight, so they need a feed packed with energy from quality fats and proteins. Our editorial team researched brands that prioritize digestibility and muscle support for this specific need.

Hard keepers come in many species, from horses to dogs, so we focused on feeds suitable for equine or canine hard keepers. For horses, look for high oil content and easy-to-chew textures; for dogs, high protein and fat levels with limited fillers. Below are our top picks based on real ingredient analysis and owner feedback.