Please choose the correct ending to complete the given sentence: Pets and Animals: [header] How to keep a dog in an apartment that does not allow dogs [title] Eliminate any motivation for barking. [step] If you want to keep your landlord from discovering your dog, you need to keep it quiet. Start by removing any motivation for barking.

Ending1: Oftentimes, owners attempt to stimulate the dog's barking by making it happier and more energetic. A few suggestions include : [substeps] Trying to keep your dog in an environment where it's allowed to bark, such as a corner of your yard. Ending2: They may notice your dog rushing to the place or the dog could hear them quickly. [substeps] This will also cut down on how often you can shut the door, keeping your dog's environment quiet. Ending3: Try to observe when your dog barks and work on eliminating anything that encourages the behavior. [substeps] For example, if your dog barks at pedestrians, keep your blinds closed. Ending4: Consider other reasons your landlord might be angry with you, such as fear of being left alone or feeling the dog will not be permitted around your apartment. The key is to put a stop to your landlord's actions.

Answer format: ending1/ending2/ending3/ending4