Wow. How awful. I agree with everyone else.
And tell him not cleaning the enclosure is the equivalent of not flushing the toilet for 3 weeks straight. It's very unsanitary and unhealthy. The melted tub sounds frightening, but I'm glad your snake didn't burn to death .... And if he didn't feed the snake, what happened to the rats you gave him? Did he starve them as well?
Overall, a huge case of neglect. Not to mention animal cruelty and endangerment.
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