What should expats know about moving to Phuket with a dog regarding food prices and import policies?

A couple moving to Phuket with their dog is seeking advice on dog food prices and the costs associated with dog ownership. It is suggested that they can find dog food at pet shops or grocery stores like Tops, with prices around 1,000 THB for 20 kilos of branded food. Additionally, they are advised to find pet-friendly accommodations and consider the regulations for bringing their dog back to their home country after a year, as this may involve a lengthy process.