Please choose the correct ending to complete the given sentence: Pets and Animals: [header] How to manage diabetes in senior dogs [title] Take your dog to the vet. [step] To help manage your dog's diabetes, you should take them to the vet for regular checkups. This is true even if your dog's diabetes seems to be under control.

Ending1: The best way to keep your dog's diabetes under control is to let the vet test their blood to check the blood sugar levels. [substeps] Make sure to schedule a check up at least twice a year if your dog is stable. Ending2: Your vet will assess whether you have diabetes and determine what steps to take to treat the disease. [substeps] If your dog has diabetes, your vet will examine your dog's blood for any history of diabetes. Ending3: If you suspect that your older dog is suffering from other medical problems, you might visit the vet to check on your dog. [substeps] If you notice any underlying issues, you should continue taking your dog to the vet for checkups. Ending4: Surgery and medication is required to fix the issue. [substeps] There are options for adjustments to any dog's diet and lifestyle.

Answer format: ending1/ending2/ending3/ending4