I don't believe the android animals should have a filth rate. Or the filth rate should be dependent on their energy source. If being fed on energy they should produce no filth. The muff unit having an animal filth rate of 3.13 seems excessive. How can a MUFF unit produce almost 4x the filth of pigs? The chemical processing unit produces more filth than a regular chicken? That doesn't make sense to me. And come on the K9 Unit should be 0 for sure. I imagine a sterile environment where chemical processing units are confined to their charging dock and produce infinite amounts of chemical capsules.