I go thru this with my Tucker on occasion too, but he generally throws up or dry heaves with his tummy issues. He wont jump around like your pup but he will hide, wont jump up on furniture, reverse sneezes, his stomach gets rock hard etc. He was on SD I/D after a real nasty episode that landed him at the vets, xrays indicated alot of gas, blood work all normal. Anyways, recently he was having episodes again so the vet put him on SD I/D low fat and it has helped for now. I will keep your Tacie in my thoughts and prayers and I hope she feels better soon!