The Utah DWR is trying to convince people that bullfrogs are good eatin'! They're causing problems in the local ecosystem, so they want folks to kill them if/when they find them.
Anyway - if you happen to be in Utah, when you tire of the bullfrog you can tell the kids you let him go, but the DWR would prefer that you send him to live on a farm - ifyouknowwhatimean...