Hello again DFM,
These frogs are very lucky to to have you.

Luck is on your side as well, as I see you have been rescued by our very own ---- Heatheranne'.
It is not necessary to pull the legs off of the crickets. If the frog is struggling -- even a little-- simply buy smaller crickets.
If the legs are pulled off the crickets:
1- they may no longer wiggle enough to get the frog's attention
2- it will likely die - increasing the risk of additional bacteria in the enclosure
3- if it dies ........well...... it's a waste of a cricket
All uneaten feeders/crickets , if not already mentioned above, should be removed daily to
're-gut load'.
Enjoy your new friends !
I bet they are enjoying their clean water !!! 
Lynn