In the book Uncle Tom's Cabin how are the slave in the warehouse treated by the dealers?

On the riverboat, Legree gives Tom rags and coarse shoes to wear. He confiscates Tom's hymnal, yelling that he will not tolerate "bawling, praying, singing niggers." He tells Tom that "I'm your church- you've got to be as I say." Tom pretends to concede, but hides his Bible from Legree. Tom is wise, and he knows "it is best to say nothing" to an irrational master such as Legree. The chaining of Tom and the other slaves is aptly used to show one of the inherent wrongs of slavery. Stowe argues that the slaves should not be treated like mere pieces of furniture because "a man can feel." The scene in which Legree bellows the rules of his plantation is also important, as it shows he is a manical dictator who thrives upon brutality. His "great heavy fist" crashing down upon Tom's hands is a metaphor for his nature. The fact that he sees his slaves as merely objects to be broken is evident in Stowe's choice of the word "crack" in Legree's theat: "I never see the nigger, yet, I couldn't bring down with one crack."

From the text:

"The dealers in the human article make scrupulous and systematic efforts to promote noisy mirth among them, as a means of drowning reflection, and rendering them insensible to their condition. The whole object of the training to which the negro is put, from the time he is sold in the northern market till he arrives south, is systematically directed towards making him callous, unthinking, and brutal. The slave-dealer collects his gang in Virginia or Kentucky, and drives them to some convenient, healthy place,—often a watering place,—to be fattened. Here they are fed full daily; and, because some incline to pine, a fiddle is kept commonly going among them, and they are made to dance daily; and he who refuses to be merry—in whose soul thoughts of wife, or child, or home, are too strong for him to be gay—is marked as sullen and dangerous, and subjected to all the evils which the ill will of an utterly irresponsible and hardened man can inflict upon him. Briskness, alertness, and cheerfulness of appearance, especially before observers, are constantly enforced upon them, both by the hope of thereby getting a good master, and the fear of all that the driver may bring upon them if they prove unsalable."