Simple numbers really. There are more dogs and cats in the USA than people, and a good percentage of the people have at least one. Fish keepers are a minority.
Another good example is motorcyclists. Did you know motorcycle emmision laws are tougher than car laws? 4 stroke motorcycle engines are amoung the cleanest burning motors on the road, but since they have a small lobby in D.C. the EPA can hammer them and feel good about themselves.
Anytime you are in the minority you are a target for either harassment or neglect (or both).
