The keeper put a keg in the water, and the cats took turns going in to play with it. One cat already went in and came out. I think this is the second tiger to jump in the water.
I learned this weekend that the 3 brothers, Sumatran Tigers, are going to be leaving the National Zoo in Washington D.C. this month (December 2005). I'm pretty sad about it. Supposedly the Zoo will try to get the 2 remaining Sumatran Tigers (these 3's parents) to breed again and have kids next year. If so that should be fun, but I'm still sort of shocked that the three brothers are going to be gone soon. ;(