Cats often feel they got caught doing something they know they aren't supposed to (such as hunting). I have heard countless angry parents about how their neighbor's cat attack they son or daughter because they were in the back yard, where a cat happened to do things they weren't supposed to.
They miss or don't eant to accept the fact who started the slaughter
and in most cases it's not the cat
Define 'third', please. It doesn't make sense in the current context.
There are three dogs. One of them is ill. Means one third is ill.