Firestone Hot Springs loves the water like a fish

Yep that's fine - that's a common way to describe the way fur stands up when a wolf (or other mammal) goes on alert, in this case after hearing an unfamiliar sound.

"You mean this isn't exciting?" he chirped back to the female, mock shock briefly forming across his face although most of the expression was lost beneath the spring water, evident only in his lifted brows. "Tell me, what is exciting then?" Lukas inquired, genuinely interested in hearing any suggestions she might share for he was always on the hunt for his next bout of entertainment. He was, however, not interested in leaving his warm happy place to stand in the cold just yet, so he tipped his muzzle to her as an invite to join him.