Aussie-Chookmum
Obeying her avian masters
...or, upon closer inspection, try attaching the ramp to the the floor "lip" below the entrance. That would also lower the angle of the ramp and they would only have to hop over the threshold.
I think Aart may be on to something here. Try taking the cleats off or replacing them with smaller pieces like beading?
Ramp looks fine to me, angle is not too steep...cleats may be be a bit too tall
I think Aart may be on to something here. Try taking the cleats off or replacing them with smaller pieces like beading?