12 year old stomach gurgling from time to time

Hello, Our 12 year old Staffordshire Bullterrier will from time to time have a really gurgling stomach, so loud you can hear it across the room. The gurgles are loud and when this happens she will not eat her dinner, she isn’t hungry. We get a buscopan down her and by the morning she is hungry again. My Mum has been writing it down in her diary and noticed it has been fortnightly but not all the times. Slight pancreastitis maybe? she is due for her vaccinations & we are going to look at getting her a full blood panel.