The captains didn't provide any hygiene for the slaves at all
if you were lucky the captains would place buckets for you to use the restroom in
The the chains were around their ankles, so it was hard to move anywhere, most of the time slaves wouldn't try to use the restroom cause it was painful to move; they would let loose right where they were
When the weather got hot and humid, there would be a layer of filth on the ground