Yes, but then you've got to deal with intelligent animals that can open doors (they have prehensile lips and will learn doorhandles by observation), climb trees/buildings or vehicles and will learn to escape by whatever means possible and will teach each other no matter how complicated it can be (the most complicated I've heard of was up a tree, onto the shed, through another tree, onto the roof of a house, over the house, onto a pickup, onto a brick wall, along and onto the front wall and down; the person had to round up numerous goats before he saw a herd of them attempt the escape and cut down the two trees).

I'm unsure if spiders would be more difficult than a large herd of goats. I suppose the goats always have the added benefit that you could become a cashmere farmer on the side, I don't really see any profitability on the side for giant cannibalistic spiders except grinding them up for reptile food for an even zanier project down the road; perhaps for when they try to breed a dragon.