recent studies that alzheimers is a reaction to invading organisms in the brain. herpes and tick born lyme disease are two of them, and according to a lecture a couple years ago at Prov, oral spirochetes may also be a culprit. however do not recall hearing toxo being tied to alz. but, you really need to not rally kill happy people to go about shooting cats. and i find the total bird killing figures kinda questionable. remember that it has been suggested the 'black death' epidemic could have been more easily corralled if people hadn't been so quick to murder all the cats that kept vermin in check.