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by kstrauser 819 days ago
It’s about risk assessment. It would be awful to have one of the small percent of dogs that have bad reactions to those medicines. It’s also bad to have dogs crawling with ticks.

Where I grew up, having dogs get sick from tick bites was fairly common. Ever seen a collie with its ears packed with swollen ticks? That has to be miserable. The risk of the medicine was less than the risk of the bites in our case.