I liked the first one, which I thought had a creative concept and was well executed. The second one seemed a bit light on humor content and was a bit too wordy (along with an abundance of bad spelling and grammar, which was distracting). The third one was OK ("there's more to sniff when you scratch the surface of life" is cute), I suppose, but still much weaker than the first. Personally, I would have just done the first one as a stand-alone comic rather than draw it out into a series.
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"And Wirthling isn't worth the paper he isn't printed on."