Each six months
That's the simple answer, but if you want to keep your dog healthy and not have her worn out with too many and too frequent litters, don't let her get pregnant more than once a year. Maybe even skip a year completely. It is hard on a dog to be pregnant too often.
Well most first time mom dogs won't lay on their pups, but if your dog is then i would recommend to watch her really closely and never leave her in the same room with her pups. Or another solution may be to give away the pups to some of your friends or family. I truly hoped that helped :)
Generally the Mom-dog nurses the pups for 10-12 weeks. It will depend on when and how much other food is introduced to them from the owner, and again the breed itself and number of pups whelped.... not to mention the Mom-dog's attitude!
give it another week so the mom can be by her puppies maybe even longer
Usually a father dog does not know his pups
This is a family project so contact your vet and get a 'puppy formula' and you will have to hand feed the pups. The vet will give you not only the proper formula but how often the pups must be feed.
no
Your gonna have to feed the pups yourself if you don't your pups will die. If the dogs breast are swollen then your dog is sick.
wolves have pups sitter do the mom can go and hunt just like a baby sitter except mom get money
You can hold the dad, but not the mom or pups. The dad should be separated from the pups but you could hold him. The mom would eat the pups if you touched them, or sometimes even her! Never touch the pups until they are old enough.
yes
The larger the dog the larger the litter
Yes, animals often adopt other animals babies. Sometimes they are out of species .