"... a couple of 5 gallon buckets and a large bag of cat litter..."

Be ready to do the emptying honors yourself. Even half a bucket of soaking wet clay cat litter is VERY heavy. (Lots of experience with used cat litter here...).

If you might not be home during the problem and the ladies have to handle it themselves, you might want to invest in a bag or two of stove pellets or recycled paper pellet cat litter. They both store well if you don't let them get wet. They're lighter. Even sawdust works just fine.

Sue