1. Changes in Appetite.

Some dogs may experience a decrease in appetite during the first week of pregnancy, while others may exhibit an increased hunger. It’s important to note that changes in appetite can also occur due to other factors, so it’s best to consult a vet for confirmation.

2. Nipple Enlargement.

Around one week after conception, a dog’s nipples may begin to enlarge and change color. They might become more prominent and take on a slightly pinkish hue. This is due to hormonal changes preparing the body for milk production.

Read and learn more>>https://heathlinecare.com/5-dog-pregnancy-symptoms-week-1/