Help support your pet’s immune system and overall health with Dr. Goodpet Crystal C Buffered Vitamin C Crystals Dog & Cat Supplement. This all-natural, homeopathic formula is made to provide dogs and cats with an excellent source of vitamin C. Not only does it support your pet’s immune function, but it can also help protect her from gum disease. This supplement is made in Switzerland, packaged in the USA and comes in an easy-to-feed powder that can be sprinkled on your pet’s favorite food.