I'm very surprised to see noone has mentioned dry ice! We raise alot of rats for food, and after all the slamming, and thunking, the best thing we have found is the dry ice method. First you find a sympathetic ice house close by, get them to sell you a small chunk of dry ice, (if you tell them what it's for you'd be amazed at how fascinated they become!) Get together about 10-15 rodents, put them in a Rubbermaid container (with no holes), put chunk of dry ice in a bowl, add water (notice all the cool smoke!)place bowl with ice in Rubbermaid, seal lid, come back in about 10 minutes, and all have gone to sleep! They can then be neatly frozen for future use.
Rick & Sherry

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