I believe someone may have mentioned that Thailand does does recognize or grant any special privileges for registered service animals. So if BKK is your final destination you are good to go, but if you need to transfer to another domestic location (I.e. Phuket or Chaing Mai), I don’t think they will be able to travel inside the cabin with you. Disclaimer: with free advice, you get what you pay for 555
Wow! That’s a lot of arguing over a hypothetical visa that doesn’t even exist yet. At least wait for the visa to be setup and the details to be approved and broadcast before fighting about it.
A visa to Cambodia is faster and cheaper to get. You can get one on arrival for $10 or $20. I forget which one. Vietnam is $100 or more. Also, if you haven’t seen Angkor Wat in Siemreap, I highly recommend it. It’s mind altering if you are interested in history