The best replacement for interceptor is heartgard.

The best alternatives to interceptor are rated as following:
★★★★★  heartgard
★★★★★  sentinel
★★★  heartgard plus
★★  dragon skin
★★  filter
★  trifexis
★  dominator
★  revolution
★  sentinel for dogs
★  assault frigate
★  fighter
★  pickpocket
★  interceptor
★  dominator amsoil
★  interceptor spectrum
  heartguard
  filter spring
  heartgard for dogs
  sentinel which is better
  heartgard dogs
  iverhart
  aop
  advantage multi
  crown victoria
  blinder
  heart guard
  black pearl
  servlet filter
  iverhart max
  grease trap
  iverheart
  crown vic
  sprint st
  bmw f800st
  event listener

Your alternative for interceptor is not listed? Suggest!
Speaking about interceptor, one probably shouldn't forget about heartworm.

Other search terms related to interceptor and their ratings are:
★★★★★ heartworm
You have in mind a companion for interceptor and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of interceptor in all years. Click on graph for more.
interceptor
heartgard
sentinel