My dog gained weight. Is her Nexgard still protecting her from fleas?

Question

My dog is on Nexgard every 30 days. I realized she has gained 2 lbs in the last few months, so I’ve been underdosing her on the Nexgard by accident. Will she still be protected by fleas if she’s just 1-2 lbs over the dose weight? Or will she require a supplemental dose to get us through the rest of the month? Pet's info: Dog | Mixed Breed Medium (23 - 60lb) | Female | spayed | 2 years and 6 months old | 30 lbs

Jennifer Summerfield, DVM CPDT-KA · Accepted Answer

She'll probably be fine for this month if she's just a pound or two over. But in the future, if she's gained a bit of weight and is now borderline or just over the maximum weight for her current dose, I would get the next size up. Nexgard has a very wide margin of safety, so the manufacturer recommends "rounding up" if a dog is near the upper limit of the weight range. :)

My dog gained weight. Is her Nexgard still protecting her from fleas?

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