How can I stop my 2 and half month germen shepherd puppy from biting

Hello. The biting is due to teething. You can provide chew to toys to keep him busy. You can even provide veggies like cucumber to chew on. Use commands like yes/no, good/bad along with treats. Training should definitely help your pet. You can opt for the same from Kuddle experts once 2nd dose of vaccination is completed.