They are not overly stubborn or spiteful, but can become that way if you don't give them enough attention or if they get bored. There is no such thing as too much activity or training with an Aussie; they can handle more than you are able to throw at them.
Modern day to day life can certainly lead to an Australian Shepherd with behavioral problems. This arises from two primary causes; a lack of mentally stimulating activity for a very intelligent dog, and a lack of an outlet for their compulsive behaviors.
Discipline, Don't Punish.
Australian Shepherds don't know “not” to do something. They learn the result of doing. If they do something and the result is positive (a treat, a belly rub etc) the pup will quickly learn to continue the behavior. The opposite effect is true if they do not receive the reward.
At 2-3 years of age, Mini Aussies are considered mentally developed and will be better at regulating their energy levels. In other words, they will start to calm down! That said, Aussies are naturally active dogs and will remain so into old age.
Australian Shepherds are known for their fierce loyalty with one person, that doesn't mean every Shepherd will act like that. Some Shepherds might not build a particularly strong bond with any one family member. Others might like one of you more than another, but they don't sit on you to show it.
While adaptable, the loyal and devoted Australian Shepherd does best with its people nearby. They are often demanding of attention and they do not like to be left alone.
Attention Seekers
Aussies can be very clingy. They crave human companionship and love being included in pretty much everything you do, including being involved in all family activity. Since they require an active lifestyle, they will want to join in everything and anything that is going on around them.
Keep in mind the average Australian Shepherd tends to bark a lot, making it a little more challenging to get him to stop barking unless you give him the 'speak' command or there is a situation in which he needs to bark to alert you.
Female Australian Shepherds
It is suggested that females are also more sensitive and laid back. Because of this, they are said to have an easier personality to deal with. They've often got their agendas and will let you know what they want.
Aussies are active yet easy-going dogs that love to romp with children. They tend to get along well with other pets. The breed is considered highly intelligent and easy to train. Aussies are known for being especially eager to please their owners.
Australian Shepherds will bark at strangers, loud noises, and other animals as a way of getting rid of all that excess energy. More so, they can display the same type of behavior towards squirrels, thunderstorms, or even a passing car.
If your dog follows you everywhere then it's a sign that they trust and love you and that you make them feel safe. Following you very closely can be a sign that they're bored, they want something, they're feeling scared or are just being nosy.
Australian Shepherds tend to whine for all sorts of reasons, such as to get your attention or if they're sick or injured. If you can rule out a medical condition, then the next step to quiet your Aussie is to train them not to whine. Failing to indulge in their bad behavior will clue them in to stop.
Australian shepherds are prone to worry, but only under certain conditions. The majority of Australian shepherds who have a regular schedule and live in a serene environment do not exhibit signs of anxiousness. However, this breed does not do well without a schedule or frequent attention from their owners.
Aussies are very sociable dogs. They can feel lonely when they're left alone often and are prone to suffering from separation anxiety. This is when dogs feel an overwhelming sense of anxiety over being apart from their owners.
Australian Shepherds are very active dogs. Most likely, they won't want to cuddle because they're so active. If you wanted a lap dog, an Australian Shepherd probably wasn't the best choice.
The Aussie, though a silent worker, is very vocal when playing with other dogs. When greeting their owners or upon being praised they will often make a singing noise, speaking to you in various tones ranging from a deep howl to a shrill whine.
Dogs bark at people for a variety of different reasons, whether because they are excited, frustrated that they can't greet the person, or even worried or uncomfortable about another's presence. If your dog is barking while in your front yard, they may feel protective of their home or be warning others to stay away.
Besides what's associated with the breed, your Aussie can bark for the same reasons almost any dog does. For example, maybe they vocalize to say hello (like to other dogs at the park), as a warning (if a stranger comes over or someone knocks on the door), or even out of fear (like during a thunderstorm).
Splooting is a great stretch for the animals' hips. Splooting also allows the animal to cool themselves by pressing their belly into the ground or against tile floors. Owners may notice that their pets sploot more often when they are younger.
A lot of this behavior can come from boredom. They may sit on you or your head simply because they like the way you react to it and they simply have nothing better to do. If this is the case then supplying them with some toys or other things to occupy their time may find you the relief you are seeking.
Because of the breed's extreme intelligence, visual sensitivity, and watchdog traits, Aussie puppies should be socialized in as many different environments and situations as possible. Herding breeds in general demand fully three times the socialization of retriever breeds.