Once upon a time, shock collars were just that. If they came with any intensity settings at all they were something like “High,” “Super High,” and “Lobotomy.” But that hasn’t been the case for a while and even the shock collars that “shock” are now so low it won’t actually hurt your dog; more surprise them. The “shock” is the same intensity of the shock you would get from a Tens electrode pad massage unit. If you’ve used them at all, you know it doesn’t hurt one bit. In fact, it can feel quite good in the proper context (but that context is not a dog’s training collar so don’t worry about him liking and wanting more of the jolt.) Dog Training

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
A study using dogs that were trained to remain motionless while unsedated and unrestrained in an MRI scanner exhibited caudate activation to a hand signal associated with reward.[2] Further work found that the magnitude of the canine caudate response is similar to that of humans, while the between-subject variability in dogs may be less than humans.[92] In a further study, 5 scents were presented (self, familiar human, strange human, familiar dog, strange dog). While the olfactory bulb/peduncle was activated to a similar degree by all the scents, the caudate was activated maximally to the familiar human. Importantly, the scent of the familiar human was not the handler, meaning that the caudate response differentiated the scent in the absence of the person being present. The caudate activation suggested that not only did the dogs discriminate that scent from the others, they had a positive association with it. Although these signals came from two different people, the humans lived in the same household as the dog and therefore represented the dog's primary social circle. And while dogs should be highly tuned to the smell of items that are not comparable, it seems that the “reward response” is reserved for their humans.[93]
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