Support your furry friend’s immunity with Wholistic Pet Organics Immune Boost Dog & Cat! Made in the USA, this powdered supplement is packed with non-acidic, highly absorbent vitamin C. This potent blend is safe for both cats and dogs of all ages. This powder supports your pal’s immune system, which is especially useful for stressful events that can lower immune system function and seasonal allergies. Simply serve as directed to help him feel good both inside and out!