My Himalayan Persian male has been making this noise lately. Kind of a quacking, coughing, hacking sound, like when a cat is gonna barf up a hairball but he hasn’t been hacking any up lately, he just makes the noise. He has appeared fine other than that, he is eating and drinking. We have given him a treatment of this gooey stuff that’s supposed to lubricate his tract and force out any hairballs. I just can’t be sure that’s the problem. Anyone else experience this? He does it every so often, maybe a couple times a day.