Although there are many breeders who are caring and diligent selling through the internet, it is also an outlet for the selling of puppies bred at puppy farms by unscrupulous greedy people who care nothing for the well being of the bitch or her puppies. These people can be very clever in disguising how these little puppy came into the world, so be extremely careful when researching where and whom you get your new puppy from as you might be unwittingly supporting this appalling trade.
As a behaviourist I am extremely passionate about this as I unfortunately get to see first hand the damage that has been caused within the early weeks with puppies being removed from their mothers too early which then has a huge impact on their adolescent and adult behaviours. Fearfulness, aggression, lack of confidence, separation anxiety just to start with, let alone the effects of malnutrition on their physical and mental development to them and to their mother who will of been bred from relentlessly.
Please research and research some more, ask lots of questions, see the puppy with it’s mum. See the dad if possible too. View the environment the puppy has been bought up in more than once. A reputable breeder will be only too happy to oblige with your requirements and they will also ask about you and your home life too as they should care about where their puppies are going to. Think about the breed traits your puppy may develop especially if it’s a cross breed. Some crossed breeds can bring out the best qualities of the breed traits but other crosses just do not mix well! and problems develop as your puppy does. If you are at all concerned about the sellers, conditions or wellbeing of the dogs or puppies you see then report it to the local authority and the local RSPCA and do not buy. We as consumers are the only people who can stand up and say ‘no’ this is not acceptable to kill this trading off.