Say whaaaaaa!?
To answer the ops query, I believe it takes a few weeks for them to lose their chemical levels to a much lower even amount.
Basically they will chill out more but at end of the day they’re cats as you know growing up like me with them and like to chase around.
If in doubt, ask your vet.
Only annoying thing abouts cats are that they kill birds. The only bird my two have caught was a Jay and man was I pissed off at them.
Ignore the cat haters and dog lovers that are selfish more often than not.
At end of the day, dogs do indeed stink, messy, a complete hassle and travelling would be a pita.