Can a cat have acid reflux?

First, the disclaimer: Yes, the cat has a vet appointment. I’m here to ask because some of you have pets and may have been through this.

Our 16 year old cat has been throwing up two or three times a day for the last three days. Sometimes, there’s no food left and he’s just throwing up liquid or having what seems like dry heaves. And every once in a while he will do this gagging motion and noise.

Any thoughts on what this might be? The thing I’m thinking besides acid reflux is an upset stomach from his food.