After you enabled the console and obviously while you are at the baby map you can use codes below to stop baby and puppy. Then you can go afk. Puppy will show up after two hours, you can type it's code at that time. You need four hours total to get to the ending.

For Baby:
"ent_fire babytrainofdeath stop"

For Puppy:
"ent_fire puppy stop"