Are These Signs Of Early Pregnancy In My St Bernard?

These signs can be of early pregnancy but not necessarily. There are few more signs which appear after 3-4 weeks of pregnancy, these are

1. Early loss of appetite (morning sickness)
2. Enlargement of nipples
3. Early loss of weight
4. Changes in behavior.

Late signs are

• Increase in appetite
• Decrease in activity
• increase in weight
• Increase in belly size

Your vet can tell you more about pregnancy.