Taking over your bed, jumping on people, and climbing furniture are some of the dog's unacceptable behaviours. You need to set clear boundaries and be consistent.

Health issues like arthritis, sore teeth, epilepsy/seizures, digestive issues, yeast infections and cancer are some of the reasons for erratic behaviours in dogs.

A change in a dog's personality can be attributed to three aspects: age, quality of dog's relationship with humans, and change in owner's personality.

The main reasons for differential behaviours of your doggy to specific dogs include fear, poor communication, possessive behaviours over resources, territorial behaviours and so on.

Growling, snapping, nipping, aggressive barking, lip curling, dominant body language, and constant biting are some of the common signs of puppy aggression.

To calm an aggressive dog, maintain a relaxed body language, and command your dog in a quiet, firm voice. Your dog is much more likely to calm down.