Pet friendly hotel in Chiang Mai - what I ask before booking

Rain is a three year old mixed dog and a very big fan of car rides, but not such a big fan of hotel lobby carpets. Because of this, I have learned to ask hotels some questions before I make a reservation. First, I ask if the pet fee is per night or per stay. Some places charge per night and it becomes expensive for a long trip. Second, I ask if dogs may use the restaurant area or only the room. Third, I ask about the weight limit, because Rain is around 18 kg and some hotels say 10 kg only. Also, I would like to confirm the room is on the ground floor or near the garden, so Rain can go out for toilet without using the lift. It is easier for me and for the other guests. I think it is important to write your questions by email, not by phone only. Hotel staff are very kind, but sometimes the answer is different from one person to another person.