I had the same problem year 1 with my coop. Tried so many things but ultimately the only solution was to cover the run and some small measures with some bricks to divert the water away from the front. Initially I erected a pvc hoop coop top on the run with a tarp covering. That lasted a...
(1) Are you new to chickens / when did you first get chickens?
We got our first flock 3 years ago in 2015.
(2) How many chickens do you have right now?
We have 7 hens and 2 ten week old pullets.
(3) What breeds do you have?
Buff Orpington, Dominque, RIR, Easter Egger, Cochin, Black...