PMSL. If garlic (in the quantities used in cooking) was harmful I can think of a lab-X, 3 pointers (one of which qualified for Crufts), a great dane (notoriously food-sensitive) and a border-collie cross who would not have lived to the ages they did.

Cows' milk they love but it does have to be restricted.

And I'd concede avocado and chocolate as not good, and leftover vindaloo is over-productive. Too much turkey gravy is an emetic (ask me how I know) - er - maybe not.

The fussy buggers would pick out and leave on the ground courgette marrow and cucumber - and strawberry. Not that they often got those.