This petting zoo at Waterloo Park's Eby Homestead petting zoo* installed waste containers to store manure for future use as compost. Waterloo Park installs 'zoo poo units' to capture animal waste, divert it from landfills Spoiler: Thoughts on it (despite not even visiting it before) *Which I can only presumed will be visited by only the most hardcore zoochatters due to being your standard petting zoo which does'nt even have rare breeds to its name.