Seeing that my Hedgie cage is rather square a ramp would be too steep. I'm thinking of using pvc pipes curving up as a tunnel/ramp. it'll be cut to where he can't get suck and I can see him going up/down. I know that'll be slippery for him and I want to know if adding sand glued to the floor if the pvc pipe would be safe. is there a safe Hedgie glue available?