United Airlines joins Delta in tightening rules for comfort animals

DALLAS - United Airlines wants to see more paperwork before passengers fly with emotional-support animals - and don't even try to bring a peacock on board.

The airline announced recently that it will tighten rules starting March 1. The changes are similar to those coming at Delta Air Lines.

United said owners will have to confirm that their animal is trained to behave in public, and they will need a vaccination form signed by a veterinarian. The vet will have to vouch that the animal isn't a health or safety threat to other people.