Stan Wilder wrote:

>The thing to do is to set out a Frisbee with antifreeze and some peanuts or >peanut butter about 100 feet from your campsite. >The varmints will go to the peanuts and poison themselves with the >antifreeze. >They'll be there partying their asses off while you catch those ZZZs in your >camper. > > I hope you are joking... ethics of poisoning campsite "pests" aside, antifreeze is also strangely delicious to dogs and cats, forgetting about that frisbee later or spilling a little could cause a few animals insides to turn to jelly... please dont do that. Please don't use antifreeze as any kind of tool other than as intended for the engine. I have seen a cat who ate it, it is really, really terrible stuff. And seeing what the keeper of that pet goes through is also terrible.

I think the best approach is the secure your goods, dont leave dogfood or antifreeze on the roof. Or, invest in some very strong containers for your roof cargo.