I have a flight at the end of the month from YYZ to LAS via IAH with 45 minutes between flights.

Should I be worried about not making the connecting flight?

On my way back I'm going LAS-EWR-YYZ again with about 45 minutes between flights.

It's been a while since I've had connections that seem so short. I just want to make sure that I know if I need to rush from gate to gate.

Thanks!