I think it might be worth your while to go to another vet and get another opinion.
Or, call the vet, have him call you back when he has a minute, there must be other options to treat this? If he doesn’t offer alternative treatments and for whatever reason you are not comfortable with his response. I would go to plan B and see another vet.
At 10 weeks the pup is an infant, so I understand your concern. The oral pesticides have not been around that long, surely there are other effective treatments?
Although, the oral pesticide for the dog might be the safest for your pregnant wife as she wouldn’t have direct exposure to the pesticide.
