Please choose the correct ending to complete the given sentence: Pets and Animals: [header] How to take care of a pregnant cat [title] Confirm that your cat is pregnant. [step] Before you start caring for a pregnant cat, you'll want to make sure the cat is pregnant. While people can take simple urine or blood tests at home to confirm pregnancy, this option doesn't exist for cats.

Ending1: If your cat is pregnant without a litter box, it means it is pregnant. [title] Find out if a cat is unaccompanied. Ending2: However, physical signs do emerge in the earliest stages of pregnancy that can clue you in that your cat may be carrying kittens. The full gestation period of a cat is around 60-70 days, so the process will move along quickly. Ending3: [substeps] Pregnant cats are more susceptible to developing basal cell colitis, which is often a sign of a parasitic infection. Basal cell colitis can quickly spread and will inflame the cat. Ending4: Therefore, you need to make sure that your cat is pregnant before adopting the cat. [substeps] Do a simple walk through the area of the cat's home to ensure there are no issues.

Answer format: ending1/ending2/ending3/ending4