Has to agree with Msb. We get into a routine and with no thought do something over and over. I wake up between 3:45 and 4:00 every morning. Been like this all my live. Routine or internal clock? I don't know. I know a farmer down the road who has I don't know how many cows. He cays. "Cows got no damn clock, they know when they need milked".
U.S. Army Retired and Proud American
Black Water Hunting Club
" BUY AMERICAN "