eh ............. i use newspaper the most economical ... i change every other days. once i saw Rain tearing the newspaper through the flooring, hence, i changed the whole set of newspaper and scotched taped it. It works marvelous. heh heh ... the BC is only used in the glass tray for their pee which i change 3/4 every other day.

__________________

百世修来同船渡，千载修得共枕眠

It takes hundreds of reincarnations to bring two persons to ride on the same boat; it takes a thousand eons to bring two persons to share the same pillow. It is fate and 'yuan fen' that brings two persons together, value an encounter and treasure a relationship.


http://tickers.TickerFactory.com/ez.../83cd/event.png