A pet dog is seen on the Lisbon Pet Show in Lisbon, Portugal, Feb. 1, 2019. The 2019 Portuguese Pet Show was held here from Feb. 1 to Feb. 3. (Photos: Xinhua)

A girl interacts with a pet dog on the Lisbon Pet Show in Lisbon, Portugal, Feb. 1, 2019. The 2019 Portuguese Pet Show was held here from Feb. 1 to Feb. 3.

A dog owner grooms hair for a puppy on the Lisbon Pet Show in Lisbon, Portugal, Feb. 1, 2019. The 2019 Portuguese Pet Show was held here from Feb. 1 to Feb. 3.

A dog owner shows a pet dog on the Lisbon Pet Show in Lisbon, Portugal, Feb. 1, 2019. The 2019 Portuguese Pet Show was held here from Feb. 1 to Feb. 3.

A pet dog is seen on the Lisbon Pet Show in Lisbon, Portugal, Feb. 1, 2019. The 2019 Portuguese Pet Show was held here from Feb. 1 to Feb. 3.

A pet dog is seen on the Lisbon Pet Show in Lisbon, Portugal, Feb. 1, 2019. The 2019 Portuguese Pet Show was held here from Feb. 1 to Feb. 3.

Dog owners show pet dogs on the Lisbon Pet Show in Lisbon, Portugal, Feb. 1, 2019. The 2019 Portuguese Pet Show was held here from Feb. 1 to Feb. 3.

Pet dogs are seen on the Lisbon Pet Show in Lisbon, Portugal, Feb. 1, 2019. The 2019 Portuguese Pet Show was held here from Feb. 1 to Feb. 3.

A pet dog is seen on the Lisbon Pet Show in Lisbon, Portugal, Feb. 1, 2019. The 2019 Portuguese Pet Show was held here from Feb. 1 to Feb. 3.

A pet dog is seen on the Lisbon Pet Show in Lisbon, Portugal, Feb. 1, 2019. The 2019 Portuguese Pet Show was held here from Feb. 1 to Feb. 3.

A pet dog is seen on the Lisbon Pet Show in Lisbon, Portugal, Feb. 1, 2019. The 2019 Portuguese Pet Show was held here from Feb. 1 to Feb. 3.

A pet dog is seen on the Lisbon Pet Show in Lisbon, Portugal, Feb. 1, 2019. The 2019 Portuguese Pet Show was held here from Feb. 1 to Feb. 3.

A pet dog is seen on the Lisbon Pet Show in Lisbon, Portugal, Feb. 1, 2019. The 2019 Portuguese Pet Show was held here from Feb. 1 to Feb. 3.

A pet dog is seen on the Lisbon Pet Show in Lisbon, Portugal, Feb. 1, 2019. The 2019 Portuguese Pet Show was held here from Feb. 1 to Feb. 3.

A dog owner shows a pet dog on the Lisbon Pet Show in Lisbon, Portugal, Feb. 1, 2019. The 2019 Portuguese Pet Show was held here from Feb. 1 to Feb. 3.

A dog owner shows a pet dog on the Lisbon Pet Show in Lisbon, Portugal, Feb. 1, 2019. The 2019 Portuguese Pet Show was held here from Feb. 1 to Feb. 3.

A pet dog is seen on the Lisbon Pet Show in Lisbon, Portugal, Feb. 1, 2019. The 2019 Portuguese Pet Show was held here from Feb. 1 to Feb. 3.

Pet dogs are seen on the Lisbon Pet Show in Lisbon, Portugal, Feb. 1, 2019. The 2019 Portuguese Pet Show was held here from Feb. 1 to Feb. 3.

A dog owner in dog-shaped costume shows a pet dog on the Lisbon Pet Show in Lisbon, Portugal, Feb. 1, 2019. The 2019 Portuguese Pet Show was held here from Feb. 1 to Feb. 3.

A pet dog is seen on the Lisbon Pet Show in Lisbon, Portugal, Feb. 1, 2019. The 2019 Portuguese Pet Show was held here from Feb. 1 to Feb. 3.

A pet dog is seen on the Lisbon Pet Show in Lisbon, Portugal, Feb. 1, 2019. The 2019 Portuguese Pet Show was held here from Feb. 1 to Feb. 3.

A dog owner shows a pet dog on the Lisbon Pet Show in Lisbon, Portugal, Feb. 1, 2019. The 2019 Portuguese Pet Show was held here from Feb. 1 to Feb. 3.

Pet dogs are seen on the Lisbon Pet Show in Lisbon, Portugal, Feb. 1, 2019. The 2019 Portuguese Pet Show was held here from Feb. 1 to Feb. 3.

A dog owner shows pet dogs on the Lisbon Pet Show in Lisbon, Portugal, Feb. 1, 2019. The 2019 Portuguese Pet Show was held here from Feb. 1 to Feb. 3.

A dog owner shows a pet dog on the Lisbon Pet Show in Lisbon, Portugal, Feb. 1, 2019. The 2019 Portuguese Pet Show was held here from Feb. 1 to Feb. 3.

A dog owner shows pet dogs on the Lisbon Pet Show in Lisbon, Portugal, Feb. 1, 2019. The 2019 Portuguese Pet Show was held here from Feb. 1 to Feb. 3.

Pet dogs are seen on the Lisbon Pet Show in Lisbon, Portugal, Feb. 1, 2019. The 2019 Portuguese Pet Show was held here from Feb. 1 to Feb. 3.

A dog owner shows a pet dog on the Lisbon Pet Show in Lisbon, Portugal, Feb. 1, 2019. The 2019 Portuguese Pet Show was held here from Feb. 1 to Feb. 3.

Pet dogs are seen on the Lisbon Pet Show in Lisbon, Portugal, Feb. 1, 2019. The 2019 Portuguese Pet Show was held here from Feb. 1 to Feb. 3.