Yes, it had been cruel of her to leave Niles to fend for himself against @Drestig, but Cas had never been accused of being anything less. So, when her - their - alpha had accepted the dark-furred boy into the pack, and then called Cas out on abandoning him to his fate, the little wolf had just laughed softly and slipped out from under the bush to speak with them. After, she had just headed back to the Rye wolves' den to sleep, because it had been very late, and had dropped off to sleep beside her new packmate.
The next morning was quite pretty. Cold, of course, but very pretty. Better than the blizzard-y weather that had been swirling about the days after Phoenix had gone missing. Worry prickled in her heart at the thought of the young pup being on her own, and she sighed before carefully extracting herself from her companion's side and heading out of the den. It was pretty early, and she didn't want to wake him up if she could help it.
It was then that she noticed how sore she was. Her left foreleg - the one that was always giving her fits - throbbed with a vengeance and she sucked in a breath through clenched teeth. Between heading so far down south, then traveling with Niles, and then helping Askan search for Percy, Cas was pretty much positive her body had had enough of it.
"Dammit," she breathed, putting a bit of weight on that paw and flattening her ears to her skull with a soft growl of pain. She was glad that none of her packmates were around to see her predicament - she was exhausted, her body was aching with a dull pain from what felt like everywhere, and she could hardly put weight on her left front leg. She knew that she needed to get a hold of it quickly, before everyone woke up.
Before Niles woke up.
She really, really, did not want him to find out about her being sick. At least, not now. Not when she was pretty sure things were going well with the two of them. Not when she was pretty sure that he liked her back. Why else would he follow her up north and join her pack, if he didn't like her?
Perhaps she really was cruel, to let the poor boy get attached to a dying wolf.
Her shoulders hunched over at the thought, her normally-bright and cheerful nature entirely gone as she allowed herself a few moments of moroseness and self-pity. She was hurting - it was evident in every tense muscle on her coiled body - and, since the sun had yet to rise fully, there was no one around to see her suffer.
Or, she hoped there wasn't, anyway.