Not typically. Green tea is added to some dog foods because it contains anti-oxidants, it can aid with digestive health, and it promotes fresher breath. Green tea can also help reduce cholesterol and high blood pressure. But natural green tea does contain caffeine, a stimulant dogs should avoid.
A small amount of green tea won’t harm your dog, and if your dog’s food does contain green tea, it’s likely to contain a very conservative amount. But green tea isn’t a beverage your dog needs. Water is all the fluid your dog requires to stay hydrated.