What is the best way to keep slugs out of my outdoor cat food bowl?

I have a cat that has lived indoors for most of her life, she is 11. Since we brought our daughter home nearly a year ago the cat has peed in the house. We have tried EVERYTHING short of getting rid of the kid to make the cat happy. We have just had to spend several hundred dollars replacing part of our floor due to cat urine. Sadly, I have put the cat outside as a last resort. She has food, water, shelter, etc but I cannot keep the slugs from getting all over her stuff. Any suggestions? Are slugs beneficial? If I should get rid of the slugs, how can I do so without hurting my cat?

sprinkle salt around the bowl perhaps?

sprinkle salt around the foodbowl.

sprinkle baby powder aurond the catfood bowl.

We had this problem with our cats and dog. I put the dishes in a pie tin then filled the pie tin with water. Snails don't like water. Salt around the bowl will work too. Salt will kill a snail but it can also irritate your cat's feet. There are a number of snail baits out that work great. Just read the directions and precautions on the label to make sure it won't hurt your cat.