careless and lack of forethought

Kim had these animals in cages in an auditorium and they were running around free. She was away. Myron kept taking on bigger and bigger cages until it was quite ridiculous. Then I saw these little brown guinea pig babies. They were so cute but I couldn't find the parent. Then Myron told me that Bernie had been killed by accident when they were moving the latest big cage in. His skull had been crushed. I felt the cages were unnecessary, the killing careless and not telling me what happened not very thoughtful.