if you need to leave the country in order to apply for a visa in a neighbouring country, you could maybe leave your dog in the care of a temple or a private person or a dog shelter . .google for addresses near you
*** you do not get your „visa extended”. You are applying for a 1-year extension of your stay permit. You are not on a “visa” any more, you are in Thailand on a “stay permit”.
This stay permit needs to be re-applied for every year
*** you forgot to mention the most crucial part that comes with being on a 1-year Extension of Stay, out of a former Non-Imm-O/A visa: The health insurance
Immigration will make it mandatory for you to have a health insurance with one of the private Thai insurance companies that are listed on the so called “tgia-list of insurances”
*** Immigration will issue the 1-year Extension of Stay Permit only for as long as the insurance is valid, so you should make sure the insurance carries you through a full year, beginning on the first day of the new Extension of Stay Permit
true. But they could also get their extensions based on income, if they were not British, US Americans or from Australia. The crux is, the British Embassy as well as the US and AUS embassy in Bangkok does not issue any more"income affidavits". That's why your british mate needs to use the 400,000 THB deposit method
you can use a bank statement over a 12-months consecutive transfers of a minimum of 40,000 THB from abroad into your Thai bank account, as the financial requirement for the application to the 1-year Extension of Stay Permit. The crucial point is - you have to have accumulated these 12 consecutive transfers to be able to use them as the financial proof for your next application to the extension
while you can use original proofs of a monthly income of a minimum of 40,000 THB equivalent, for the application to the visa in the E-Visa system in the U.K., you will need a minimum of 400,000 THB in a Thai bank account in your name only, for the application on Immigration for the 12-months "extended stay permit based on being married to a Thai wife" - at least in the first year. Because the U.K. embassy in Bangkok does not issue an "income affidavit" any more, with which you in the past were able to fulfill the financial requirements for the application to the "1-year Extension of Temporary Stay Permit" (which some people call "marriage visa" but which isn't a "visa" at all but a stay permit). After you have collected 12 months consecutive month for month transfers from the UK to your Thai bank account of a monthly minimum of 40,000 THB, you can use the bank statement over these 12 months of transfers for the application to your second year Extension of Stay Permit