All good things had to come to an end, and while Kili would have loved to stay in the tree longer, he also wanted to know what was going on. Soon, his questions were answered. The sled they'd seen from above had pulled into the wooded clearing, and the driver was soon to depart.

"Thieves! Fire! Murder!" 
Radagast was out of breath, and he seemed relieved to have spotted Gandalf. "I was looking for you, Gandalf. Something’s wrong. Something’s terribly wrong." The shorter wizard motioned him over so that they might speak in private, and it was here he explained what had happened only hours before. 
"Spiders, Gandalf. Giant ones. Some kind of spawn of Ungoliant, or I am not a Wizard. I followed their trail. They came from Dol Guldur." Clearly, he was frazzled, and he spoke as quickly as he could.
"I saw him, Gandalf...from out of the darkness, a Necromancer has come."

Kili had overheard Gandalf speak of Radagast before, but he was completely unlike how he had envisioned. Though they were not at immediate risk, he kept a hand on his bow, and he was ready to nock an arrow should the need arise. "What is he going on about?" The youngest Durin was impatient, and he longed to overhear their conversation. It must have been of the utmost importance; even Gandalf looked mildly distressed.
Suddenly, an unearthly howl was heard in the distance, and Bilbo looked up, his face visibly paling. 
“Was that a[i] wolf?[/i] Are th-there wolves out there?”

Thorin had heard this sound before. "Warg ­Scouts!" At that, he drew his newest weapon once more, his jaw set. Where there was a Warg, there was often an Orc. "Which means an Orc pack is not far behind.”