| + | Permethrin is the active ingredient of many 'spot-on' paraciticides used in the control of fleas and ticks in dogs <ref> '''Clinical effects and outcome of feline permethrin spot-on poisonings reported to the Veterinary Poisons information Service (VPIS), London''', ''Journal of Feline Medicine and Surgery''(2007)'''9''',335-339 accessed on http://www.fabcats.org/esfm/permethrin.pdf 07.11.2010 </ref>. |