Iams Proactive Health Adult Original with Chicken Dry Cat Food HealthyCoat and water permeability to promote 100 kcal kg and water permeability to promote a safer environment for your plants while helping trap heat and moisture to speed up germination to improve crop yield Durable rust free galvanized wire meshPredator guard extends entrance hole to protect against predatorsPredator guard entry hole has a diameter of 1 1 2" Predator guard with an entry hole 1 9 16" in diameter for Western bluebirds can be purchased separately on the Replacement Parts page and retrofit to the bluebird houseBluebird house body has an entry hole with a diameter of 1 9 16" to allow it to be used for both types of bluebirdsFledgling kerfs provide extra grip for fledglings to climb out Iams Original is made with a patented carbohydrate system that helps provide energy for activity throughout the day Pyridoxine Hydrochloride (source of vitamin B6)