One of the taxi suppliers has agreed to participate in this program. Others are likely to follow. Still others may decline. Of course, some drivers may be allergic to cats, so those drivers should never be selected for this service. Also, some customers will undoubtedly have similar allergies, so a vehicle that has been used to deliver kittens within the last 3 days should not be selected for customers who declare such allergies. Look at that diagram of services. How many of those services will have to change to implement this feature? All of them.
