Soni can't meow. This has how we have always seen him and known him to be. When he opens his mouth it sounds like someone is whispering "meh!". He can't purr either. It sounds like some awful gurgling/straw sucking sound. Any thoughts on this? We were told by a vet, while ours was off duty, that he was probably just a soft meowing cat but we don't really buy that.