Also as a side note to this...what do you do to solve your chew outs? I tried putting aluminum foil tape over the hole but thy're already making their way through that now!!...what should I do??...other than use different tubs without edges for them to chew of course!! I already put blocks of wood in there for them to chew on, which lasted for a while..but once they peed on it a couple times they dont chew it anymore, they just stand on it to get to the water easier..[/QUOTE]

Need to know more info. What kind of tubs are you using? I have used sterelite, mortar and websaraunt bus tubs. I have had chew outs in the sterelites, from ASF's and chew outs in the bus tubs from rats. I made a screen insert to fit in the bottom. Makes for a pain in the butt to clean.I have not had any chew outs in the mortar tubs at all. They haven't even chewed at all.