Hi,
Thanks for the responses to my sons'concerns about our cat Lily. Actually we did switch food - we now most of the time use IAMS and we have noticed the problem is much less. I think the eating too fast could have very well have been a factor also. She is getting better, but she does tend to be kind of a little piggy and wants to eat the other cat's food as well as her own!! the breathing is just when she is sleeping and it is kind of a quiet snoring sound. I think maybe it would be a good idea to get it checked out.