An Unhealthy Concentration of Feces

There are many things about this sign that give me pause to wonder. For example, if there were a direct correlation to my eating and breeding habits, I’d make the old lady who lived in the shoe look like a childless spinster.
But perhaps first and foremost, is there such a thing as a healthy concentration of feces? And how would that be different from an unhealthy concentratiion of feces?
And have you ever met a goose that *wasn”t* aggressive?
(Or, for that matter {and preempting the obvious response} ever had an aggressive goose?)