[SalesForce] Chatter feed data migration

There are two things you could mean by "Chatter Feed Tracking", first is if individual field changes on the object are tracked in the chatter feed: I don't believe this is possible to detect.

The second is if chatter is enabled at all for that object (which is confusingly shown as "Enable Feed Tracking" on the object in the setup menu). This is possible to detect in apex.

First, you should check and see if chatter is enabled for the org at all. If chatter is on the User sObject will have feed tracking enabled under any situation (admins can't disable it for this object):

Schema.SObjectType.User.isFeedEnabled() will return true if chatter is on in the org.

From there you can check the specific sObject type that you're interested in via the same syntax but replacing "User" with the API name of the object you want to check. You can also use the global describe to do this dynamically (if you don't know the sObject type until runtime).

As the comments have said - you'd have to disable and then reenable chatter for whole object or modify the field tracking. You can do it outside business hours if it's some kind of data fix.

(let's ignore for a while the fact that the whole purpose of audit fields is to track history and you might get in trouble during audit even if it's a valid data fix ;))

You can also run the data fix, then find the Chatter entries created by you & delete them. At least it worked for me when I had to delete one user's entry created from field history tracking, you might be best trying it out first in a sandbox.

SELECT Id, Name,  
(SELECT Id, Ttile, Body 
    FROM Feeds
    WHERE Type = 'TrackedChange' AND CreatedById = :UserInfo.getUserId() 
        AND CreatedDate = TODAY
)
FROM My_Object__c

Loop through the results, build List of Ids for FeedItems you want to delete and fire!