I love to feed my tank crickets one-by-one. I grab one with tongs. Then I drop it amongst a set of hungry fbts. sometimes it seems that the cricket drops straight down a frog's throat head first and is gone in a second. they are accurate little things.
I find I can sometimes pick one up, turn it upside down...sometimes it will relax completely and i've got a limp upside down frog on my finger. It's a form of unken reflex maybe, but the frog is not bunched up as much as completely and totally relaxed and limp.
i figure as long as you keep your water within a healthy temperature range, they can probably deal with almost any weather just by jumping into the water. Even though I have an indoor tank, I have no air conditioning. So I have both a heater and a chiller on my tank to keep the water within a narrow temperature range all throughout the year.
Good lord they love to hunt down crickets. It seems rare to see a fire belly toad refuse food. If one of mine does, it's because it's stuffed full and catatonic.