I was just restocking the trucks and noticed that we have 3 cases of predator bait that we use that was forgotten. I just ordered a years worth more last week and there is no way that we will use all of it up in a years time.

How long will it last, any ideas? Its tombstone (DR47)

Depending upon who made the bait and how it was made with respects to preserving it for one season use and sale in mind, or if when made that producer was preparing it for an indefinite holding time period.

Regardless, excess product would be best stored in a cooler, non UV area to best hold the product for extended periods. Heat can have detrimental effects on lots of things over the long haul.

I would contact the producer and ask their suggestions for holdover of the material. Some baits will hold well indefinitely as mine will but everyone does things differently.