Foster's Home for Imaginary Friends

After Eduardo finds a puppy when he was taking out the trash, he decides to keep it, despite the fact that dogs are not permitted inside the house. However, despite Eduardo's best efforts, the dog gets loose and starts causing problems that Eduardo takes the blame for in fear of the puppy being found out. Will Eduardo manage to keep the puppy without Mr. Herriman finding out, or will the puppy be forced to leave due to Mr. Herriman's strict policy against dogs?