I am SO sorry to hear that!! ((hugs))
What kind of cages do you have,what kind of legs do they stand on? Do they lean against anything?
If they don't lean you may be able to try a few different things -
As long as the cage is free standing (meaning the ants cant climb from something onto the cage) you may be able to do something with water to resolve the ant issue.
I have dogs and even though they are indoor pets I do normally feed them outside. To keep ants out of the food bowls I buy the flatter metal pans to set the actual bowls they eat out of in.
I put water in the larger, flatter pans and since the ants can't swim, they cant get to the food itself.
I dont know if that makes any sense at all, but it came to mind anyway.