Please choose the correct ending to complete the given sentence: Pets and Animals: [header] How to choose a good hiking dog [title] Determine how trainable the dog is. [step] Some breeds are more independent and hard to train than others. If you want your dog to be able to frolic off-leash, you'll need a dog with good recall (comes when called).

Ending1: [substeps] If you do plan to let your dog off his leash, avoid dogs with a strong prey drive. The last thing you want is for your dog to run away after a squirrel, never to be seen again. Ending2: Other breeds may be more independence breeds, such as pit bulls, rottweilers, shih tzus, or trumpet breed. [substeps] Look for a responsible, attentive dog. Ending3: You'll need a dog with a keen ear, a common feature of a trainable dog, and a good sense of smell. [substeps] Whichever breed you choose, consider what your breed is and is most likely to do outdoors. Ending4: Other breeds, like mountain dogs, are harder to train and are less adaptable. Size and age of your dog determines what type of trail you'll want to keep your dog on.

Answer format: ending1/ending2/ending3/ending4