Hi, how old is Tuukka? Do you know his background before you rescued him, if he had a history of snapping or biting? Can you call the people you got him from and get some background information on him? I wouldn't give up on him so early, but use caution around kids and people. You can try getting him some behaviour training and get some advice from a trainer that has experience with this type of problem. With training, you might be able to figure out why he's biting, or what his triggers are, and hopefully a trainer can help you rectify the behaviour. Good luck, I hope it works out for you and your family. Please keep us posted.