Burlap makes me think toenails getting caught up in it and a great poop collector.I thought the burlap might be softer on their feet than grip tape? The tape certainly looks nice though!
Sorry, worst case scenario trouble shooter here.

Sanding any rough spots and splinters is first thing to do.
Cleats at ~4" apart and an angle of about 30° from the ground works pretty good here.
Putting the bottom of the ramp on a concrete block(16" high) can be a quick angle reducer and it keeps ramp off ground so it doesn't rot as fast.