During this time, many people may be thinking about making an addition to their household, whether it is because they just love having more animals or to find a companion for the pet they already have. When a new pet is introduced into the household, a period of stress and adjustment is normal and should be expected by the adopter, but there are ways to help make the transition easier. The type of pet you chose, the initial introduction, and changes in YOUR behavior as a result of the new pet are all important factors. Although personalities are a factor, this usually means an animal that is smaller, younger, and a different sex.
Animals also tend to get along better when they are all spayed and neutered.
Territoriality and dominance behaviors are affected by hormones, so spaying and neutering will help reduce aggressive impulses. When introducing a new pet, it is best NOT to do it during a period of stress, such as when you have just moved to a new house or apartment, have drastically changed your work hours, or a when a pet is recovering from an illness or injury. With dogs, you can help by first introducing them in neutral territory, such as at a park, rather than in your home. Let the dogs sniff and get to know each other before taking them home together. Any inappropriate behavior should be corrected immediately.