Not adding a picture because I didn't feel like looking at ants today...
Our cat, like most, eats his dinner from his bowl on the floor. However, when it comes to his wet food, he’s not particularly clean—we had to get him a back-splash board to keep it off the wall. The problem with this, kitchen garbage cans in general, any food left on the counter is that it attracts ants. The very unfortunate thing about ants is that, once they find food, they tell all the other ants and soon you’ll have a whole mess of them wandering around the kitchen.
The most common method to fighting ants include the bug sprays and baits you would think of. However, please remember that these are poisons and most can be harmful to people and pets. When using an insecticide spray, please keep away all pets and children until the spray has dried and make sure the area is well ventilated. For dusts and baits, placement is crucial as you want them in places the ants will travel through but not a place easily accessible to pets and children. Places such as behind/under appliances or on high windowsills are appropriate. For all pesticides, keep away from aquatic pets at all times.
There are other precautions you can take to fight ants in the house. Keep the kitchen clean and free of crumbs and spills. Ants also have an aversion to water and chalky/dusty substances. Placing your pet’s food bowl in a plate with a little water will prevent ants from reaching it. And a line of some sort of powder (chalk, baby powder, baking powder, etc) will stop them from reaching specific areas. Sealing up all appropriate gaps and cracks around the house will also prevent ants from getting inside.
If all else fails, you may want to contact a professional to get their opinion on the matter. Good luck with the ants, and wish me luck too.