Final Blox Rodenticide should be used inside tamper-resistant bait stations where birds and other non-target animals will not come in contact with it.
Please keep in mind, in can take a week after ingestion for Final Blox Rodenticide to kill a rodent. There are many variables that could determine how effective rodent baiting is. Please see our Rodent Control Guide. If you have been using the same for quite some time, we recommend to swtich it up, because yes, they can build a resisitance. You could consider using a different product like Generation Mini Blocks.