Welcome!
Most of what you have said is well know to most here.
Many of us are already doing in the here and now when it comes to various skill sets, be it gardening, raising livestock, wood working, homesteading skills etc.
Never had that issue with my rabbits. But cleanliness is common practice around here. Contary to popular belief, when SHTF it is not going to be MZBs that get you, but sanitation, clean potable water that kills the most.