well we just got two Mini doberman/ chihuahua mix puppies two days ago. they are both male and they are both brothers. Their father is a Mini doberman and the mother is a chihuahua. they got comfortable really quickly with us. We let them sleep in their cage and stay in the cage during the day (until they grow older). i take them out to play in the backyard two-three times a day. sometimes in the morning, and in the afternoon and at night. I feed them three times a day puppy food (the round biscuits) and i add milk to the dish. well when i take them out they wont follow me. sometimes they will when i run but most of the time they are just wondering around or laying down. last night they were chasing me when i ran but once they reached me i would start petting them but one of them (the smaller sized one) would bite my hand and make noises like its angry at me.(this is my question. why is he biting me?) and when he plays with his brother he would bite his brothers tail then they would fight ( i dont know if there playing or not). All they do is bite each other and wrestle and the one who bit me is the one who always starts it. so do you guys have any advice for me? anything would help..