Moe Speaks: The Peep-Cheeps

Fergus!  Taffy!  Any-doggy!  I need HELP!

Surely someone among the genius-Welsh-collective can help me solve this riddle.  Because if I could just get through this vent in the floor, I could have unlimited access to the Peep-Cheeps.  

I can hear them, but I need to know how to tunnel to them....