Why has the dog suddenly become clingy?

A dog becoming clingy suddenly has many possible causes. First, it may lack security or feel fear, especially after changes like moving, family changes, or fright, and seeks comfort from the owner.

Second, clinginess may mean illness or discomfort; if it comes with poor appetite or lethargy, see a vet. It can also relate to age: young puppies are dependent while learning, and elderly dogs need more care as the body declines.

Also, a long-ignored or lonely dog will act extra clingy when it finally gets attention, craving a closer bond.