United Airlines is changing its policies regarding emotional-support animals, banning animals under the age of four months from the cabin, “to further ensure the well-being of our employees and customers while accommodating passengers with disabilities,” the company said in a blog post on Thursday.

“This is just another move in a long line of moves to restrict pets on air crafts,” Christopher Elliott, founder of consumer advocacy organization Elliott.org, said. “Animals could go the way of peanuts on planes at some point in the future — ideally airlines do not want to have any animals in the cabin.”
The new policy will go into effect on Jan. 7 and comes weeks after Delta Air Lines made a similar change. “Animals under the age of four months typically have not received the necessary vaccinations that help ensure the safety of our employees and customers,” United said. The airline did not respond to request for additional comment.

https://www.marketwatch.com/story/united-airlines-no-more-puppies-on-its-planes-2019-01-04