Please choose the correct ending to complete the given sentence: Pets and Animals: [header] How to save a newborn puppy with a cleft palate [title] Identify the palate early. [step] As soon as the puppies are born, rub a finger on the top of their mouths. If you feel an indentation in their upper palate, it may be a cleft palate.

Ending1: Frequent sneezing and a " runny " nose after nursing may also indicate a cleft palate. [substeps] If you notice that puppies are not suckling or if they are unable to eat, it is most likely a cleft palate. Ending2: Is the indentation large enough to fit a ring finger? [substeps] The baby teeth look spiky. They may be semi-round, with missing canines, or have loose, broken teeth. Ending3: Try using a " thumb rub " to identify the cleft palate. [substeps] You can also use a baby slurp, like corn milk. Ending4: It often appears overnight, but one mark may also be visible in the early days of your puppy's development. [substeps] If you suspect something is wrong with your puppy, contact your vet immediately.

Answer format: ending1/ending2/ending3/ending4