We have never heard of wolf spiders eating cat food. We suspect it is attracted to the readily available source of protein and moisture. Wolf spiders often sneak into homes, especially at this time of year when the weather is starting to cool. They are ground-dwelling generalist predators that commonly inhabit and hunt in lawns, leaf litter, around buildings, and similar habitats in urban and natural areas. They eat insects such as caterpillars, earwigs, ants, beetles, grasshoppers, crickets, roaches, and other spiders. You could use a tall cup to catch the little wolves and put them outside in the lawn or landscape bed. Be sure the weather stripping on your doors is in good shape. That will deter them from coming indoors.