Wendy - I just wanted to say I'm sorry you've had to put up with such a torrent of vile abuse for asking such a harmless question. For some reason people get off on attacking others with views they consider 'inferior' to their. It's basically another form of bullying and we all know that bullies are basically cowards and deeply unhappy people but it doesn't make it less upsetting to be on the end of. I hope you manage to travel safely to Thailand with your dog. Just wanted to wish you the best.
There are no visa run possibilities and nothing has been done to make it easier to get a visa. All surrounding countries are closed and, if you leave, to re-enter Thailand you need written permission from the Thai Embassy in whatever country you're in, a valid COVID negative test done not less than 72 hours before you fly and COVID health insurance. Then, once you've arrived, you need to enter 14 day state approved quarantine at your own expense.