In breeding can cause an awful lot of health problems in dogs, such as tumors, heart problems, and I heard of a couple of awful cases where a dog's skull was too small for it's brain. So, in short, you would be quite lucky if they were born normal.
Some of the bigger breeds do, and some puppies do drool.
This is called a singleton puppy. It is not unusual for a dog to give birth to one puppy, but it is uncommon. The average litter is about six puppies, but some dogs may have more or less.Singleton puppies lack the companionship of literates, so they often grow up confused about their position in the "pack", may be over-playful because of the lack of playmates it had as a puppy and may be a little snappy because it didn't have siblings to test its "strength" on (which is a perfectly normal thing for puppies to do).This behaviour is not the fault of the puppy. You can try to find a sibling for the singleton puppy by adopting a stray puppy.
That depends where you got the puppy from. If the puppy is from a breeder, the breeder often breeds dogs in her own home. If you got the puppy from an animal shelter, the puppies are often taken from puppy mills (places that breed massive numbers of puppies under bad conditions) or found on the streets. Puppies from puppy stores are usually purchased from breeders.
It is not unusual the female to only have two or even one puppy; especially if it is her first litter.
Yes you can but only when the puppies are full grown adults and when they have a full relationship with each other. This way you can create new breeds of dogs and re breed the the new breeds
Puppies are always cute, but mixing breeds is rarely a good idea. Will the puppies grow up to be tempermentally unstable? Unknown. Will the puppies manifest a previously repressed/supressed medical condition? Unknown. Will the puppies benefit from their mixed heritage? Unknown.
No, puppies are very friendly and learn fast. If your puppy is mean then there has to be a reason
apart from this being highly unethical the pups would be more prone to serious health problems and deformities
There are many websites available online where you can find puppy genitalia pictures, which will help you distinguish male puppy from female puppy.
No, most puppies have two eyes, not one.
No. They sell tiny puppies and label them as teacup puppies. But really the puppies grow into poodles or other small toy dogs. there are no breeders for teacup breeds, witch just proves there is no such thing.
Female dogs bark at their puppies in order to gain their attention. It could be that the mother wants/needs to scold, cuddle, nudge or tell her puppies something.