Good Morning and welcome! I am Dr. Loretta, a licensed veterinarian and I am happy to answer your question.
Since this behavior is after dinner, it appears that your gal is having some digestive issues that is causing her pain and in turn, causes her to feel insecure. The first thing to do is to follow these instructions:
Fast your girl for 12-24 hrs to allow the digestive tract to calm down and heal.
Give her Pepcid AC or Famotidine at 0.5 mg per pound every 8 hrs. That can be purchased over the counter at the pharmacy.
Give only small amounts of water during the fast or ice cubes
After the fast, feed rice and boiled chicken (2/1)
If she is feeling better, wean her back to her regular diet. If she is still exhibiting this odd behavior, have your vet examine her since we may have missed something. The one thing that we do know is that something is wrong with your gal and it is important to find the cause so it can be treated.
Does that make sense to you?
Please let me know if you have ANY other questions. My goal is to give you 100% satisfaction and if you are not yet satisfied, please REPLY so I can clarify for you.
Sincerely, ***** *****