Mikey and Amber, I can tell that you are both wonderful people who care a great deal about birds (and animals in general, it seems). You've both contributed a lot to this thread and this forum.
It sounds like Mikey was speaking out against deliberate neglect of one's pet. Of course, deliberate wouldn't be the case if a person is gravely disabled and unable to care for even themselves, let alone their pets. Amber, I think this was exactly your point. It does not sound like either one of you was in disagreement with the other about any of this.
I don't think Mikey was aware that the elderly woman, whose birds were left out in the frost, had Alzheimer's. This seems to have been the misunderstanding and the point at which things went sour in your debate.
Mikey, I thank you for encouraging people to be responsible pet owners and taking responsibility for their actions.
Amber, I thank you for being empathetic and mindful of the effects of mental illness.
Let's please keep things civil and be respectful of one another. We are all here for the same cause = )