Do your rats fight a lot? Mine do. It seems like everytime I watch one of the tubs they are just fighting and wrestling and pinning each other down the whole time until they all get tired out and fall asleep on top of each other. Is it normal? a dominance thing? or are these rats aggressive? I've heard that you shouldnt breed aggressive rats...

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..