Yes, as long as the chihuahua is "in heat" and they get "hung" (which you will know), the pug can get the chihuahua pregnant.
It really doesn't matter as long as the dog is as delicate as the chihuahua.
As long as you like!
long haired
All dogs have hair, but if you mean LONG hair, only if the chihuahua was the long haired breed.
The Short (Smooth) haired Chihuahua would shed less fur, the long haired would need more grooming suggesting that the long haired would shed more (there's more hair)
3 weeks
38 days
i feel my chihuahua is still has one pup she started today at 3pm how long for her to have the last pup?
About 12 hours and 45 minutes, depending on where in Chihuahua you go.
11-20 years
usually short