Please choose the correct ending to complete the given sentence: Pets and Animals: [header] How to help your chihuahua during labor [title] Understand the normal progression of pregnancy in chihuahuas. [step] The average gestation period for a dog is between 58 and 68 days. Try to pinpoint when conception occurred so you can anticipate your dog's labor accordingly.

Ending1: [substeps] The same is true for puppies of the first two sexes. Due to the difficult parenting process, pregnant animals are often more likely to have births after four to six months. Ending2: [substeps] Ask your vet if they recommend experiencing pregnancy at exactly this time. Adopting your dog from a breeder is very similar to adopting from a shelter. Ending3: [substeps] Your dog may most likely begin to get sick during labor. This means her contractions will be more frequent and may become heavier over time. Ending4: Chihuahuas tend to deliver at 8 weeks gestation. [title] Take your dog to the veterinarian.

Answer format: ending1/ending2/ending3/ending4