How much time does it take to measure the success of your horse tack or horse feed in Nebraska? For horse feed first, assure the feed you select is appropriate for your horse and that the guaranteed analysis is met with quality ingredients. Provide the feed for at least 45 days to allow it to work. Evaluate how the feed works by using body condition scoring, body weight and skin/coat condition. If you need help, contact a trained equine nutritionist or ask your veterinarian