When it breathes it whistles and limp tail.

[JGB24]

I just acquired what I believe is a Mojave male from the shelter today. Its condition is fair but i have some concerns.
First of all. Most time when it breathes it tends to make a whistle sound. I checked his mouth and it has no bubbles or anything. It looks pretty good. So do you think its nose might be a little blocked? The shelter was not keeping it warm.
Secondly is its tail end. From a few inches before the vent to the tip of the tail its kind of limp. like if I wiggle the end it just flops around but when I tried to hang him from just the tip of his tail he hooked it around and had a firm grip. So is it something to worry about or is it normal? Ive just never had any of my snakes do that.

[Kaorte]

Some of my snakes will whistle from time to time. It usually has something to do with something blocking the nostril. Most commonly it is a bit of stuck shed.

As for the tail thing... I don't really know. Maybe you could shoot a video to show what you mean? It sounds like it might just be normal though. Ball pythons don't really use their tails a whole lot.