Originally Posted by
bhomburg
JetBlue has a limit of two pets per passenger, not one. The second pet needs to be in their own carrier and requires an extra seat to be purchased.
The OP has done everything right.
I'm sure that the OP has done everything right, since the three pets are already booked. But perhaps JetBlue should update its website, which indicates one pet per passenger:
https://www.jetblue.com/help/traveling-with-pets