I don't necessarily think that "trying to kill himself" and "committing suicide" are always the same thing the way most people would say it. I would probably make a silly comment that a puppy who eats rocks is "trying to kill himself" but that wouldn't mean he's suicidal. So it depends on the context as to whether that's what they really meant.
But I have a weird idea of what animals are capable of, especially cats. I think cats are capable of suicide. They're generally depressive animals, and under certain circumstances I think can and will make the decision to end their own lives. Dogs are less depressive, and I have never met a suicidal dog. But that doesn't mean I think they're not capable of it--they probably are. But like humans, just because they're capable of it doesn't mean that many will actually do it.
And I don't think that not understanding vague and theoretical human concepts like guilt is connected to their cognitive ability, or the ability to make life-and-death decisions. They don't think the same as humans, but they do think. Kind of a cultural difference, I guess. Most Americans don't understand the concept of ritual suicide, but to the Japanese it's just the way things are.
But I have a weird idea of what animals are capable of, especially cats. I think cats are capable of suicide. They're generally depressive animals, and under certain circumstances I think can and will make the decision to end their own lives. Dogs are less depressive, and I have never met a suicidal dog. But that doesn't mean I think they're not capable of it--they probably are. But like humans, just because they're capable of it doesn't mean that many will actually do it.
And I don't think that not understanding vague and theoretical human concepts like guilt is connected to their cognitive ability, or the ability to make life-and-death decisions. They don't think the same as humans, but they do think. Kind of a cultural difference, I guess. Most Americans don't understand the concept of ritual suicide, but to the Japanese it's just the way things are.