so me and my girlfriend r thinking about getting a second puppy. our female gsd is 4 months old and were thinking of getting her brother who is same age but not potty trained. were just worried about if it will be hard to get him up to speed with her training, that hes gonna make her bad idk. what do u guys think is it a good idea? i really want to i would love to have 2 especially brother and sister GSD's. i think its double the fun lol am i wrong?