monty is my only cat that i walk on a leash outside and i am so afraid he will bring things like this in to my others.but he needs this walk like a dog daily or he gets depressed...i do put flea stuff on him...i hope it is enough.i also get afraid and never know which stuff is safe to use.every vet says something different about each product it seems but i am scared to death of haemobartonella AND bartonnella too.