I would assume you still have to teach your pet to use the ramp. I'm not sure they would understand its purpose although they might accidently find it while paddling around the pool edge. Maybe I'm underestimating the intelligence of these animals.

When I first installed the doggy door - my Dobbies did not know what to do with it. Other than they would stick there head out the opening (to see what the weather is?) then pull their head back in and start pounding on the door with their paw so I can let them out. It took a while to show them how to go through the new opening. Now they blast through it - like the door is going to get ripped off the hinges. I expect one day I'll see them running accross the yard wearing the door like a collar.
Thanks for the link.