Cherry Problems

So I was visiting my parents a couple of weeks ago and they mentioned their cherries were nice and early.
It was a little dark out but I found a few and they were good.
Next day a few customers came out and commented on all of the "melting" cherries!
Went back out and inspected all of the trees and sure enough something was going on.

Through some online research I think I can rule out fungal infections...
I really am just at a loss.
Maybe 80% of every tree,  the fruit is on the verge of rotting due to others in the bunch or everything is bad altogether.

Important things I took note of:
Obviously very warm spring, very early.

Chickens have somewhat recently been moved into the cherry orchard for a few different reasons.
I took note of this because there seemed to be an abnormal amount of flies and larva absolutely having a feast on those trees (unhygienic conditions?)

I have some theories and I would love to hear what you guys have to say.