Here is a small Farmville tip. this tip will help you to collect milk from a cow in Farmville more than one time in a day
If you have a diary farm which can hold up to 20 cows.
Here is it
1. Buy 1 diary farm and keep just one cow inside.
2. When they are ready to collect milk, collect milk from the diary farm which have all 20 cows first.
3. Move all cows to the diary farm which have just one cow
4. Collect milk from that diary farm
You can keep any number of 4 diary farms with 1 cow on each and 1 Diary farm with 20 cows, and can collect milk from 100 cows a day.