It's fine to hear most people tell it... I was saying all of that for the people saying what a shit holiday it would be to spend two weeks in quarantine. :)
To be clear... there is no tourism at this time... There is no consideration for holiday travelers, and there are no commercial scheduled flights in to Thailand. The quarantine is for repatriated Thais and foreigners that qualify with certain visa types. Thai people can take the free state quarantine, but all foreigners must pay for an approved alternate state quarantine hotel. These vary from 3 star to 5 star and include options to go really fancy in presidential suites or pool villas.
There is not currently any information for when flights will resume and tourists will be allowed in. There is also no indication when entry will be available without a mandatory quarantine. At this time, there is a substantial waiting list for Thais and eligible foreigners on the government coordinated repatriation flights.
Should be plenty of time to apply if he gets started soon... Word around the campfire is that it is taking 3-4 weeks for background checks/processing for new members.
I don’t know if I am part of the crowd, but I can assure you that life is way better when you aren’t waiting with baited breath for announcements about amnesty extensions.
Contact the airline directly. Different airlines have different policies, and it is highly unlikely that any one here knows who your carrier will be and what their specific policies are regarding pets on these kinds of flights.