No, some stay the same size during and after pregnancy.
Nipples will darken during pregnancy.
I hope si
No the nipples do not change colors.
Maybe
Yes they usually gets darker during pregnancy and breastfeeding.
nipples get bigger, increased appetite....read a book on it or consult your vet.
NOOOOOOOOOOOOOOOOOOOOOOO
Yes, you can experience this during your cycle and during pregnancy.
during pregnancy
yes, breast changes significantly! They become bigger, firmer and the circles around nipples become much darker. At the end of pregnancy they sometimes start leaking colostrum.
If your dog's nipples are getting bigger and it is a female it probably is having puppies soon. So watch over your dog and if they keep getting bigger, and bigger she would most likely be having puppies.