Your poem is extremely riveting and vivid. However, as someone who actually works with animal research, at one of the world's largest cancer treatment centers, I feel obliged to point out a few inaccuracies:
-The animal area is kept extremely clean. The halls are a light blue and well-lit, as are the rooms. It smells, but not nauseatingly so, and cages are also kept clean and free of parasites.
-The cages themselves are made of a sort of Plexiglass. They're spacious, being about ten inches across and a foot and a half long. At most, they contain four mice or two rats at a time- if a cage is overcrowded, the keeper is fined. Bedding is provided- soft, cloth-like material as well as pebbles- and food is kept on a rack above the ground, low enough for the animals to reach, but high enough to prevent it from becoming soiled. The cages are connected to a machine that circulates fresh air through them around the clock and provides fresh water whenever the animals need it.
-The animals are cared for. There is a veterinary clinic that sees to the animals and a monitor staff that checks on all the animals every day for injury or abuse. If they find any animals fighting, they separate them and give them medicine for their wounds. Aside from being used for cancer research, the animals are healthy, not bleeding, infected, bony, or scabbed over.
-Finally, we do NOT brutalize our animals. We do
not relish the pain they go through- yes, we are aware that we cause them pain- and we try to make it easy on them. Most researchers you'll meet are extremely nice people, not sociopaths. My coworker speaks softly to her mice when she handles them, apologizes often and pets them after she sedates them. Even if there were animal abusers, they wouldn't last long- anyone who abuses an animal faces job loss on top of heavy fines.
Is animal research cruel? Yes- I'll not deny that. But the alternative, letting people die or suffer through current treatments, and letting their friends and families watch the entire time, is far crueler.
Apologies if I was harsh- I just wanted to clarify things.