Feeder rats

Hello,

I purchased feeder rats for some of my snakes.and they all seem have a yellow tint to them.is this pee?is this normal frozen feeders?

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Probably pee they tend to pee alot when they are euthanized

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All rats do is poop and pee. I am tempted to get a separate tub to feed my snakes in so I don't have to clean their cages every week

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