Well, has she ALWAYS communicated that way? Or was she previously able to "meow?"
If she USED TO meow but now does not, then a visit to the veterinarian is obviously in order.
On the other hand, if she's always voiced "ack" instead of "meow" then it's more likely that that's just what she says.
All cats are different, and some breeds sound more different than others. In thinking back to the cats we've had through the years, some have said "Mrrp," while others have said "Mrrow,' and still others have said "Prrrat" or "Nnnneek."
If you think that's odd, just think again. Humans have many languages - why shouldn't cats?
