1. When does van set up his shop next to the bar?

Go to the calender in your house and it will tell you when he comes.

You get the chicken feed in the place that you order your animals except go down, click and then click on other then you'll see bird seed.

I'm not sure about Van, but you have to order the chicken food from the tall building in your farm.

Van always comes the 3rd and the 8th of the month but some days he comes randomly.

You order chicken feed in the Food Storage building. When you "look" at the left table, click on Tak's face and then select the little icon under the "order animals" section, click on "other" and select Bird Seed.

1. Around 10 -12 almost everyday but sometimes he dosnt come when it's raining
2.You order it from the account ledger in the food storage place and whe it arrives it's in the tool shed on the shelf ^_^