No...he had to eat bugs and grubs when he lived with Timon and Pumbaa. Remember what Timon 说 "If 你 live with us, 你 have to eat like us" that was because they were not predators so they couldn't offer Simba a meal that a lion would prefer to eat. So when he returned to the Pride lands, he was surrounded 由 lions, predators, just like him so it was no use for eating grubs anymore, he must have passed to a carnivore diet. :)
No. Because female lions hunt 4 the pride. Why would 你 want a few little puny bugs to catch yourself when 你 can just sit around waiting for lionesses to bring back a nice meaty lunch.