Please choose the correct ending to complete the given sentence: Pets and Animals: [header] How to teach a dog to dig [title] Start with a simple find trick. [step] If your dog has a favorite toy or treat, place the treat or toy on the ground. Then tell your dog to find it.

Ending1: As the dog sticks the treat in the small hole (s) it doesn't have to move the treat very fast or with great force. Once you've placed a toy in the hole, stand back, or continue standing so your dog knows to find it. Ending2: In some cases, they will call out the memory of their favorite toy and let you know where the treat is located. By placing the treat or toy close to your dog, your dog is likely to remember where it is. Ending3: This is often more effective with more than one person, so one person can hold the dog while you place the treat. This will start getting your dog to associate finding with the toy or treat. Ending4: This will teach your dog that it can find the toy as well as the treat. [substeps] Some common tricks you can teach your dog are " see-eyes " and " sit-eye ".

Answer format: ending1/ending2/ending3/ending4