Parasites Ants Near/Possibly Inside Cage, Need Advice

So, it's getting warmer where I live, and that means that ants are starting to find their way inside my apartment. They usually get in under the poorly-sealed dining room back wall, where one of my piggies, Timmy Turner, is housed. I'm worried they'll get into his cage, food, and hay, if they haven't already (the food and hay are both sealed, but it's still a concern, as I've had problems with ants before), so I'm considering moving his cage. Should I? And what are the risks if I don't? Is there anything I can do to keep the ants out, without moving the cage?

(posted under medical because I wasn't sure where else this would fit)