Yep! GastroCare should be used daily. The hope is that in 6+ months, you can do away with the underlying cause of the sensitive stomach.
If you feel that your dog’s digestion is better, and has been for a few months, then you can try stopping the formula.
If consistent GI issues return, you can simply add GastroCare back into their daily routine. There really is no harm in using GastroCare throughout their entire life either, especially if your pup is prone to a sensitive stomach.