My 3 hives in August

Summer is starting to wane. I have 3 honey bee hives this year. All 3 I started this year.

One is doing great. It has 3 mediums full of bees.

One is doing not so great with 2 mediums full of bees and starting on a third but with a pile of dead bees in front of the hive.

And the last is doing terrible. 1 medium mostly full of bees with little progress being made.

I'm not sure what the deal is with the last two hives here.  I think one was exposed to some pesticides but I have no idea what the problem is with the failing hive.

Barring a miracle, I'm going to lose at least one if not two of the hives.