Tip for double currency with the animal feed house
This might of been discussed, but for those who bought the animal feed house that you can tap every 4 hours and it clears all the zoo people and frogs. If you clear out all the people and frogs first and get the no more people to tap pop up then press the feed house when your town is clear. You will get full currency like your town was completely full of frogs and people. So basically you can double your currency every four hours. I hope this makes sense.