Disclosed are compositions comprising NPN compound coated with a bypass agent allowing ruminal bypass of the composition and a method for increasing fiber digestibility, a method for increasing feed intake, a method for increasing somatic growth, a method for increasing milk production, a method for reducing N excretion in a ruminant, a method for improving rumen pH stability in a ruminant, a method for preventing or reducing ammonia toxicity in the rumen. The compositions and methods of the invention are particularly suitable for ruminants that are held in harsh climates and/or at remote locations from a farm.