3. A Change in the Household or Schedule:
Certain types of changes can cause a Maltese to become sullen and feel down, therefore manifesting as lethargy and loss of enthusiasm.
One of the most common instances is a change in the household or environment. This includes moving to a new home or the addition or loss of family members (both human and animal).
In many cases, this will just be a matter of allowing enough time for the puppy or dog to become accustomed to the changes.
In matters of losing an owner or pet friend, there are additional steps that you can take.
First, it should be noted that dogs do need time to mourn a loss. After a week or two, it can help to introduce a Maltese to a new element that engages his senses and serves to refocus his attention. Often, just a short break can bring about improvement.
You'll want to visit a fun spot that is new to the puppy or dog. This can be a new dog park, a walk along a shoreline, a picnic in a new setting, or even a trip to a pet supply store.