Dogs bite and nip for several reasons, most of which are instinctive. Puppies bite and nip to explore the environment. Mother dogs teach their puppies not to bite too hard and discipline them when needed. This helps the puppies develop bite inhibition. Owners often need to show their puppies that mouthing and biting are not acceptable by continuing to teach bite inhibition. more on this
When using a crate, make sure that it is large enough to let your pup stand, turn around, and lie down comfortably. However, it should not be so large that your puppy could use a corner of the crate as an elimination spot. If your dog does start eliminating in the crate, you should stop using this method. Your puppy may have picked up this bad habit in a previous home, or he may be too young to deal with a crate.

Positive reinforcement is the key to success. A common mistake is to punish your dog during training or become angry. This will only cause confusion. You can try to hold your dog's attention with treats and enthusiasm, but know that it is time to end a session when your dog becomes bored or tired. Try to end sessions on a positive note. Eventually, successful training will be achieved with patience and consistency.
Sometimes, our dogs just don’t seem to respond to us when we try to train them. They may be stubborn, strong-willed, or just a little mischievous. Of course, there are some habits that need to be broken for their safety as well as our own - or just because the neighbours are starting to complain about your dog’s barking and you don’t want to get fined. 

My husband and I used Amazon Basics brand Puppy Pads while potty training our puppy. They are much cheaper than the name brand pads and we found that they actually seem to hold significantly more liquid too. This made our clean up job after work much easier since all we had to do was dispose of the pad (and not have to clean the tile floor beneath it). more

The origin of the domestic dog (Canis lupus familiaris or Canis familiaris) is not clear. Whole-genome sequencing indicates that the dog, the gray wolf and the extinct Taymyr wolf diverged around the same time 27,000–40,000 years ago.[3] How dogs became domesticated is not clear, however the two main hypotheses are self-domestication or human domestication. There exists evidence of human-canine behavioral coevolution.
Emotional contagion is linked to facial mimicry in humans and primates. Facial mimicry is an automatic response that occurs in less than 1 second in which one person involuntary mimics another person's facial expressions, forming empathy. It has also been found in dogs at play, and play sessions lasted longer when there were facial mimicry signals from one dog to another.[12] Puppy potty Training
Unfortunately, there is no magic length of time or milestone age when a puppy can be considered fully housetrained and there are many factors that go into how quickly a puppy can be potty trained. Your puppy’s age plays a major role during the initial phase of potty training, as a very young puppy won’t have the muscle control necessary to hold it for long periods of time. go here for more
Training clubs that run the Kennel Club Good Citizen Dog Scheme - the largest dog training programme in the UK are a sensible place to begin. Here you will learn about every aspect of dog ownership from the Puppy Foundation Courses through to Bronze, Silver and Gold award levels. Go to GCDS Training Clubs in your County to find one near to you or email the GCDS Team ([email protected]) or call 0207 518 1011.
Consequences must be consistent When training your dog, you-and everyone else who interacts with her-should respond the same way to things she does every time she does them. For example, if you sometimes pet your dog when she jumps up to greet you but sometimes yell at her instead, she’s bound to get confused. How can she know when it’s okay to jump up and when it’s not? Dog Training
Dog communication is about how dogs "speak" to each other, how they understand messages that humans send to them, and how humans can translate the ideas that dogs are trying to transmit.[6]:xii These communication behaviors include eye gaze, facial expression, vocalization, body posture (including movements of bodies and limbs) and gustatory communication (scents, pheromones and taste). Humans communicate with dogs by using vocalization, hand signals, and body posture. Dogs can also learn to understand communication of emotions with humans by reading human facial expressions.[7]
In 2012, a study found that dogs oriented toward their owner or a stranger more often when the person was pretending to cry than when they were talking or humming. When the stranger pretended to cry, rather than approaching their usual source of comfort, their owner, dogs sniffed, nuzzled and licked the stranger instead. The dogs' pattern of response was behaviorally consistent with an expression of empathic concern.[16] more on this
In 2004, a study reviewed 5 other studies of feral dogs published between 1975 and 1995 and concluded that their pack structure is very loose and rarely involves any cooperative behavior, either in raising young or in obtaining food.[82] Feral dogs are primarily scavengers, with studies showing that unlike their wild cousins, they are poor ungulate hunters, having little effect on wildlife populations where they are sympatric.[83]:267 However, several garbage dumps located within the feral dog's home range are important for their survival.[84] Even well-fed domestic dogs are prone to scavenge; gastro-intestinal veterinary visits increase during warmer weather as dogs are prone to eat decaying material.[85] Some dogs consume feces, which may contain nutrition.[86][87] On occasion well-fed dogs have been known to scavenge their owners' corpses.[88] Puppy potty Training

The term personality has been applied to human research, whereas the term temperament has been mostly used for animal research.[18] However, both terms have been used interchangeably in the literature, or purely to distinguish humans from animals and avoid anthropomorphism.[19] Personality can be defined as “a set of behaviors that are consistent over context and time”.[20] Studies of dogs' personalities have tried to identify the presence of broad personality traits that are stable and consistent over time.[19][20][21][22] more on this