I'd only be worried about stinging insects and poisonous spiders. Not sure about Canada, but in Vermont the only poisonous spiders we have, I believe, is the black recluse (spelling?) and they are very rare.
One winter, I got the brilliant idea to get the cats a big ol' log to scratch. As "Log", as we called it, warmed up, we started hearing little noises - the cats were fasinated by it. Shortly after that, giant wood beetles started to appear around the house (!).
Our older cat would bat them around, but not eat them. Our younger cat would catch them and crunch them up (eeeewwwww!). She loves eating bugs.
Needless to say, we got rid of Log.