I'm just wondering if dogs like humans can experience Acid Reflux?

4yr Cattle Dog x about 22lbs

She doesn't throw up bile, no throwing up at all expect Sunday after she ate soemthing that didn't agree with her. For the past few days shes doing this burping like movement, hard shallowing movement and some tongue flixing while doing that burping movement. Shes eating but not OMG food eating (she's never really been like that but she hasn't been as excited about food). She has never scarfed and barfed, she eats out of puzzle toys.  She still drinks normal gums are normal. Poops are alittle smaller then normal but she doesn't seem like shes in pain or uncomfortable about it. Her energy level is a little lower then normal. She doesn't seem to be in pain when I touch her tummy. 

I was wondering if anyone else has had this problem before?