Bullfrog tadpole update

[Jacobsherps]

Hello all some of you may remember my bullfrog tads, i thought id give an update bc its been some time . First off ive changed the tank yet again but now i think this is permanent. Ive put some rocks and flowerpots in and spared some guppies from my snake, there is also a small snail who resides with them. Some questions i do have are,
Can they eat small feeder insects
how long do the front legs take to come in.
How long does the tail take to absorb into the tad.
When will the eyes begin to bulge on the head.
When will the tympanium become visible
Thats it for now but heres some pictures