Look for a swollen abdomen after about 3 to 5 weeks
Check for pink, enlarged nipples around 2 to 3 weeks
Notice increased appetite
Watch for more sleepiness or lower activity
Observe nesting behavior
See if she becomes more affectionate or more withdrawn
Look for weight gain
Watch for vomiting or mild morning sickness
Notice a calmer or more protective temperament
Have a veterinarian confirm with an exam, ultrasound, or X-ray