Yes they can, however it may be diffucult for the chihuahua if the chihuahua is a female, and bulldogs are known for having difficulties giving birth because their pups can sometimes be too big for them to give birth to.
honestly the idea scares me of giving the mother chiuahua a bath after giving birth. I am not aware of who is asking this question or how often you bathe your dog, but i would wait at least a month before washing the mother
yes they do cause a chihuahua is a very small dog they can barely give birth to there own i had a Yorkie an a chihuahua mate before you would have to take them to the vet but just make sure to help her out just in case
It depends on how old they are and it depends on nourishment. However, a chart can provide a general guide. You can view a chart, showing general weights from birth to eighteen months, further down this page, listed under Related Links.