New Home Base Holidays members in San Francisco included the following information, that's very important for them, in their home exchange offer: 'We are both non-smokers and we don’t have any pets (allergic to cats). First time exchangers and we’re excited to find a good match and to share our home.' This should deter other members with cats from contacting them as, even if a cat will not be at home during the period of a home swap, a home where one normally lives, however carefully cleaned, is not going to be suitable for anyone with a severe allergy to cats. I recently had an overnight guest (friend of a friend from Canada) who, late at night when I showed her to her room, informed me that she couldn't sleep in the room even if I took out the feather pillows on the bed as she was very allergic to feathers. Fortunately we have a sofa bed which I quickly made up with foam filled pillows - but it would have saved some hassle if I had known about the major feather allergy in advance! Maybe Canadians don't have many pillows filled with feathers any more? This is another example of information on an allergy you would need to share with home exchange partners in advance of a home swap too.