I've never grasped how the detail of how the Canadian system works, but a concept that's too alien for most Americans to conceive, you never recieve a bill for medical care.
also.
Pet Shops, I only remember pet shops in the UK as a small single person owned business. In the US they are a big store in any mall selling reptiles, birds, fish and maybe cats on the premises, don't see dogs in ours unlkess the local shelter is havoing an adoption day. One of the weird little things for me is that supermarkets, like Sainsburys or Tesco, sell Tropical Fish, no other live animals, except of course live lobsters on the fish counter.