I have had a few frustrating experiences - I generally used the same taxi firm, but sometimes they would have no prob taking me there, but bringing me back was a different matter, despite it being less than an hour later!! I am lucky that if the cat is light enough and weather dependent, I can actually walk to mine in just under 10 mins, but when I didn't have a car, I tried to take two in one go to reduce the number of visits each month, which meant I couldnt walk. They will always ask if they are in a carrier though.