Thats not a dog, its a monkey.

Monkeys are fairly resistant to demon possesion, though it is not completely unheard of. Just to be on the safe side submerge the monkey in holy water or holy pepsi™ for two to three minutes and dry using Martha Stewart™ brand bath towels. If you submerge the monkey for longer than three minutes you risk angering the gods and/or recieving a monkey bite. You do not want to be bitten by a monkey, trust me on this one.