Please choose the correct ending to complete the given sentence: Food and Entertaining: [header] How to handle late whelping in dogs [title] Have x-rays done. [step] When a dog is near her due date, consider having an x-ray done. An x-ray can confirm that she's indeed still pregnant.

Ending1: It can also show how many pups she has. For instance, if she only has one large pup, that can make whelping difficult. Ending2: This is most reliable for early pregnancies, but cannot be done for developing puppies. X-rays can also identify particularly bad spots in your new dog. Ending3: If the owner wants to do an x-ray, the vet would want to send a sample of the dog's blood. If the vet believes she is at the point of termination and isn't allowed to continue with the pregnancy, a dna test would be done. Ending4: X-rays can be quite pricey and often the results are so unclear they suggest an emergency is imminent. [substeps] Many gestational parents sell their dogs for the price and they are more than willing to pay larger processing fees.

Answer format: ending1/ending2/ending3/ending4