We dont allow our 3 year old to sleep during the day. he's in bed for 8 everynight.. and he wakes up 7-8 everyday..
If we allowed him to sleep during the day he wont go to sleep till 10-11 and wakes up 6-7..
Every child is different so its trial and error..
I tried bells whiskey on my daughter but she just carried on, it didn't really effect her .. I was told when i was a baby i had the same treatment.. but thats going back a few year and is probably throwned upon.