Reapplication before the 4 weeks is up will cause overdose! Same with any other topical treatments. Treat your home and see your vet for other treatments that can be used concurrently with this spot-on or wait 4 weeks before trying another product. Please do NOT reapply -that is very dangerous advice and warned against on the product's label.
answered 1 year, 8 months ago
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Immediately. I suggest you re-treat the dog & the house, inside & out.
answered 2 years, 4 months ago
0out of 3found this answer helpful.