Does he know it's winter?
In October, after a mild fall, we took Jasper swimming at Spring Lake Park for what we thought would probably be the last time until spring. BUT, we've visited the park at least four times since the new year and when we get to the water, he goes right in. The winter has also been mild, so I guess the rushing waters of the creek have never really frozen this year. I don't even think it registers with him how cold the water is...he just jumps in after the stick we throw, brings it back, and waits for it to be thrown again. An unfortunate side effect: it takes him a whole day to dry off (and that smell...!). We can't wait until it's actually warm(er) out to take him swimming every day!