I never tried it with my two. But for Petsmart Perks card holders it is on sale for 5.99 for a 4.4 lbs bag.
Buy 1 AvoDerm Dog Food 4.4 lb bags $5.99 (you must use your PetPerks card to get this price)
Use the $5/1 AvoDerm Pet Food coupon found here coupon link
Final Cost $0.99 plus tax