A: Year-round. According to Michael Dryden, DVM, MS, PhD – Department of Diagnostic Medicine/Pathobiology, Kansas State University, Manhattan, Kansas in his article: “The Case for Year-Round Parasite Control.”
“Fleas and ticks are more than mere nuisances. They cause distress in dogs and cats and, more important, they cause disease. On-again, off-again preventive programs are not the optimal way to safeguard the health of pets and their families.” To read his complete article, click here.