Thanks for the kind words on my web page! I'm a little surprized to hear that Canada doesn't have oposums. I guess the winters are too hard. That means that there are no marsupials in Candada because the Virgina Oposum is North America's only pouched mammal.

I hope your kitty passes the heartworm check. Although cats are a lot easier to treat than dogs. Often times just putting them on heartgaurd can solve the problem.
They tend to only get the microfilaria stage of the heartworm, although it can at times progress.

Good Luck!!

Cheers,
T