dr-archeville:

Ravi, the first time you had a zombie rat, you got distracted while on the phone with Peyton and got bit.

I know you realized that zombie rats can’t pass zombie-ism on to humans,
and since you’ve been having sex with Peyton, we can assume you’re not
even an asymptomatic carrier.  (Though the fact that never occurred to you does not speak well.)

But now you’ve made a second zombie rat (after the first one was killed by your first attempt at a zombie cure), and you’re leaving it in the lab while you go on a romantic weekend getaway with Peyton.

Are you not concerned Zombie Rat 2 might get out and start an ecological catastrophe?  Because even if it can’t pass zombie-ism on to non-rat species, it could still turn other rats into zombies, and then they’ll stop doing their normal rat things (like eating garbage and insects, and scavenging roadkill) in favor of eating the brains of other rats, which will still cause BIG problems.