could anyone tell me what your cats sounds like when they have a hairball? Cassie has been making this terrible sound since yesterday, off and on, she's gagging, it scares me, is that what a hairball is? I have seen the other cats on occasion actually throw up a hairball, but this is just gagging then it calms down and stops... Patches has done the same thing for months.. he was doing that sound alot... i brought him to the vet, test etc. they said it(the test results) idicates an allergy. he stopped for a while , about a week ago he started it again, off and on. now Cassie. I feel bad, like I should know better after having a cat for over 2 yrs... but I am not sure about this. I'm going to give her and Patches the hairball medicine and see if that helps. I just wondered what other cats sound like when they have a hairball, to know if thats what this is?