Yesterday, in a pool store, I saw something called a "scamper ramp" -- stated on the package it was for pets & critters.

(I only have a cat who won't go outside -- tried carrying him out by the pool (not to get in) once -- he peed on me. It was disgusting!

Anyway, when I saw that "scamper ramp" -- I thought "hmmm ... hope I don't have any "critters" in my pool!

So maybe do a search for ramps for pets or something and hopefully you'll find just what you need!