Never let an animal get away with bitting you. Especially if they are young they will get use to it and think its ok. Correct the behavior by not giving them what they want which is to be left alone. Be gentle but firm with them ,wear gloves if your scared but spend time with them to show the animal your not a threat, then when they no longer show the behavior put them away. It can take awhile but be consistent, firm, and fearless and they will come around.