Looking for mice proof foam

[Bob Carriere]

....but we have domesticated cats and a few feral cats that roam around the canvass Winter shelters all Winter long looking for a quick snack...... but the cats DO pee on everything so it works as a repellent......even repels us when we open up the Winter garages in the Spring time....... Now squirrels are another story..... and they love eating the plastic insulation on the barn electrical wires....... feeding them off the bird feeder does not help......