I was hunting a few yrs ago in very cold weather i think it was about 15 degree`s I had two spikes walk right past me and walk to the the stream that i was hunting next to. The bank was about 10-15feet up from the water. the first one jump off that bank and made aloud splash and then swam across to the other side which was about 20-30ft across then the other spike jump in swam across climed out on the other side shook off the water like a dog and walked away the steam comming off there body`s made them look like they were on fire! the cold water did not seam to bother them.But i was about to freez to death