Poultry Spice

I have bought some chicken supplies today (for those just in case moments...... best to be prepared).

Got some poultry spice, for if or when the hens need a bit of a pick me up.

Does anyone have any recommendations of how frequent it should be used?  Do I sprinkle on the food as a preventative method or should I save it for the 'as and when'?  And if so, for how long a period.

I have just done a search on the forum, but couldnt find anything on frequency (although did find some amusing threads from earlier on in the year). 

 
Also got some ACV so will be putting this in the water on weekends as suggested by others.

Look forward to hearing your suggestions.

Hold on a minute... I thought poultry spice was what you put on chicken when you cook it!  Is this something else?