Today one of our youngest chickens died in the kiddie pool. I saw it before we left to run errands, standing in the pool (presumably to cool off). I suspect it was drown by the duck(s) like the last chicken (who was also the smallest at the time). The water was shallow enough for the chicken to stand up and the water was just touching it's belly.
Later this evening I caught Luna (our white barn kitty) hunched over something she'd caught. I went to investigate and realized it was one of the new baby ducklings. It was dead and stiff, so I don't know if she killed it, or if it died some other way and she just found it. It didn't appear to be damaged. Either way, we now have seven baby ducklings... three black and four yellow.