Should animal abusers receive longer sentencing than child abusers?

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I was posed this question in junior college once upon a time, it was a writing exercise to teach us how to write an argumentative paper. And, of course, I took the less popular view that YES, animal abusers SHOULD receive longer sentencing! My logic was (is) as follows: 1. The definition of child abuse has become way too vague, and now incorporates what used to be widely considered disciplinary. 2. Animal abuse implies a degree of malice that I'm not sure child abuse does, the serial killer profile almost ALWAYS includes some form of animal torture, not necessarily child abuse. 3. We are talking about length of sentence, not severity. If we are accepting 1 & 2 of the argument, then we would need extensive mental evaluation, which would take a lot of time. Please reply with your thoughts, I look forward to it!