My puppy (maltese/toy poodle mix) is 3 months old. she is being trained to use the bathroom outside. Most of the day she is in her exercise pen where she eats sleeeps and plays with her toys. I take her out to do her business and thats great. But every now and then if we let her loose in the house, she will leave a present or pee on the carpet like today . Why is she doing this? Am I doing something wrong? I'm a bit stressed out about this. Please please, can anyone offer some good advice on stopping this from happening? Is she spending to much time in her pen? I know during housebreaking there will be accidents, but its been over a month now. Shouldn't she have gotten the concept already?