I’ve found that if you hold the cat in your lap, use the finger and thumb of one hand to wiggle on either side of their face where their mouth begins to open their mouth, if you can then get the pill on the very furthest part of their tongue closest to their throat, there is an automatic reflex to swallow. I used to try putting it in their food and it never worked. This worked every time.
What I’ve read says that you aren’t charged unless you cross the boundary. If you reside inside the zone and never leave and enter again, you won’t be charged a toll.