Please choose the correct ending to complete the given sentence: Pets and Animals: [header] How to help a reactive dog relax around food [title] Get to know your reactive dog's body language. [step] The body language of a reactive dog can be difficult to discern. But generally, a happy dog will wag its tail, perk up its ears, and raise its head.

Ending1: An agitated or aggressive dog will growl, stand stiffly, snarl, snap or bite, and lower its head to line up with its spine. Watch your dog's head, tail, and mouth closely for signs that indicate its mood. Ending2: This cues a word or two, or vocalization, but also lots of verbal cues (such as growling and snarling). [substeps] A happy dog usually uses positive reinforcement to encourage behavior. Ending3: [substeps] Smiling, rubbing its body back and forth, and maintaining eye contact are all common ear signals to communicate happiness for reactive dogs. Another signal to take notice is a flash of white or red hair on the nape of the neck. Ending4: A satisfied dog will raise its foreteeth, mark its throat with the tip of the tongue, and occasionally give off a puffed up tail. If the dog is trying to feed, it will often twitch it a few times before eating, showing the dog that feeding is an acceptable behavior.

Answer format: ending1/ending2/ending3/ending4