You can't get rid of neighbors. Once you have them, you always have them. And Zynga will not answer your request to get rid of them either. They also don't care if you cheat.
I know someone who IS cheating, but there is no way to report them.
The only farms that you are able to see on FarmVille are your neighbour's/facebook friend's farms.
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A screen pops up while you are playing. You do not have to share it with friends. You can share it or not help the lost animal.
If you put your cows in a dairy farm, then put a bull (they wonder ARound friends farms,) in it, when you harvest, a calf may be born.
Farmville is the best. Make sure to send all your friends plenty of requests and things for there farms. They will really appreciate it and come play with you.
You harvest crops, and you visit neighbours farms.
They already did. You have to buy them.
You buy them from the market and fill them with cows.
All you have to do is walk around your farm or fertilizing your friends farms and you will find collectibles. Also occasionally you will find a stash of collectibles and you will be asked to share with your friends and vice versa.
There are no cheat codes. But some tricks to get more fuel, building supplies and cash is to send gift requests to your FV friends and visit your friends' farms once a day.
To get free Farmville money without paying for it with real money is quite simple. To get the Farmville money visit your friends farms and help them, or look under bottle caps of certain soft drinks.
You harvest crops, and visit neighbours farms and help them out.