Lambert Kay Avitron Vitamins is a liquid vitamin supplement, providing the essentials for normal health and feathering. Avitron liquid vitamin supplement by Lambert Kay is a multi-vitamin formula with Vitamin C for birds, hamsters, gerbils, mice, rats, and guinea pigs. Tasty and easy to give. Liquid formula can be added to your pets water using the enclosed eye dropper. 1 ounce (19.6 mL) per bottle. Made in the USA.