respiratory infection???

[lostwithin]

Hi., although ive owned my ball for many years ive never had any problems healthwise with her, except of course her tendency too refuse food for longer periods of time then i was expecting, but she has never become unhealthy due too this and i have learned now it is nothing too worry about, but latly, ive noticed while shes trying too find an escape route which she does do at nights from time too time, she was hissing occasionaly, then after closer observation i belive she may be congested she is a slight noise when she breaths if you listen closly, and from time too time she breaths outward quite deeply, and makes a hissing noise, almost as if sneezing some times, n e way she seems quite healthy, and most of the times she makes the hiss noise shes pushing on the lid , so my question is, does this sound like a respiratory infection, or is it simply deep breaths as she trys too escape ?? any adive would be great thanks,