Note
Long sentences are fine as long as they're understandable. If they can be broken up though, I've found most readers seem to prefer that. Myself included. Also, keep in mind that I'm not in any way saying that your writing is bad by including these examples. The following are just my opinions.

Examples
^L1S2 "Logan, covered in his own blood, stopped to catch his breath, his foggy breath clouding from the cold."
At eighteen words, this sentence isn't incredibly long. Its delivery and the way readers receive it could both benefit from breaking it up though. By doing so you could also avoid the repetition of 'breath'.
^E.G. "Logan, covered in his own blood, stopped to catch his breath. It came out in a fog, clouding from the cold."
Alternatively, if you wanted the sentence to read more as one you could connect the two sentences in my example with a semicolon for the same effect.

^L34S1 "Straining, Logan reached for his dagger, which had been knocked away, and pressed the blade deep into the wolf's shoulder."
Once again, this sentence isn't incredibly long. It is sort of long though. And it also feels somewhat off when I read it, due to the additional knowledge about his dagger being knocked away added in the middle. Breaking it up could fix that.
^E.G. "Logan's dagger had been knocked away. Straining, he grabbed (for) it, then pressed the blade deep into the wolf's shoulder."
I'm not a huge fan of using 'and' unless it's absolutely necessary or adds to the feel of a sentence in some way. It's such a common word that it can become repetitive very quickly. Which is why you may notice that I've used 'then' in my example.