possible ri?

I have about a 6' bci that i got about four months ago that in the past week its breathing has become pretty audible. Since I have gotten her you could periodically hear her exhale while handling her. Now you can her her exhale a lot more frequently. She is still eating, there are no bubbles or mucous coming from her mouth or nostrils, and she is not lethargic. I also checked the inside of her mouth, which was kinda tricky to do because she didnt want to hold still. As far as I could tell there was no excess saliva or bubbles. The breathing itself doesn't really sound really raspy or anything. I guess the closest description I could give of what it sounds like is when I exhale through my nose heavily. I have raised the ambient air temps just to be safe. Is it possible that she is just breathes heavily or does this sound more like an RI?

My 8' BCI does that all the time. You normally can't hear him when he's just lying there, but if he's moving around or gets excited it gets loud enough to notice. I don't think it's anything to be concerned about, but if you notice bubbles or a lot of yawning I would take him in.

That makes me feel a lot better about the whole situation. I've been thinking about pairing her with my salmon male in the near future and the whole breathing issue kinda worried me because I didn't want to expose my male without any health problems to that, if it indeed was something that was contagious and could possibly need veterinary attention. I will definitely watch for any signs of ri.