Please follow below steps to activate Chatter Feed on a Standard and Custom Object ...
1.From User menu goto Setup
2. Go to Customize and select Chatter
3.Click on Feed Tracking.
4. Select the Object and enable tracking on the fields of your choice.
Enjoy...............!
2. Go to Customize and select Chatter
3.Click on Feed Tracking.
4. Select the Object and enable tracking on the fields of your choice.
Enjoy...............!