I hope the tests come out ok, too! =( How old is Alaska? Poor guy. But, honestly, it's only the tumors that are really a product of old age. The rest can be prevented, almost always.

I suggest regularly giving all of your dogs healthy chews... Greenies, rolled/pressed rawhide, bully stix, RAW marrow bones (beef femur bones, probably the cheapest & most effective option!), etc. And brushing teeth daily is cheap & very effective. You can get ear cleaning wipes from your vet and just keep them regularly cleaned and they should be fine. Also, avoid walking the dogs on hot concrete and excessively running them on hard surfaces, that will tear up pads quickly and it's very painful for dogs.