The Zebra scanners can be configured via the DataWedge app installed by the manufacturer.
The settings are detailed in this video, go back into the StoreFeeder app once set and perform a barcode scan.
On the device open app DataWedge
Edit the profile (you may be using the Profile0 default profile, or have created a new one just for use with the StoreFeeder app. If you have created a new profile you may have to ensure other profiles are not enabled).
The profile must be enabled at the top
Keystroke output should be set to disabled
Intent output must be enabled
Intent action should be "com.sf.barcode.action"
Intent category should be "com.sf.barcode.category"
Intent delivery should be broadcast
Intent IP output is disabled
Go back into the StoreFeeder app, select "I have updated the settings", click Start Configuration and scan a barcode 12345678.
This video is for a Zebra TC20 but may be applicable for other Zebra devices that have the DataWedge app.