A corn snake's weekly diary can be the lightest of snake records, because this is an active, generally hardy species whose week still contains the few events that matter: a feed, a stage of the shed cycle, the temperatures, and how the snake behaved in hand. One short page a week, honestly kept, builds a growth and appetite history that no keeper's memory can match across the years a corn snake lives. Write the page on the same day each week so entries stay comparable.
The feed and the blue phase belong on every page
Record the prey your corn snake was offered that week, its size, and whether he took it, refused it, or ate and later regurgitated. Beside the feed, note the shed stage you observed: clear and bright, dull, or in the cloudy-eyed phase keepers call going blue. Those two lines interpret each other, because a corn snake approaching a shed commonly skips a meal, and the page showing 'blue, refused' reads as routine while 'clear, refused, third week' reads as a question. After a shed completes, add whether it came away whole, eye caps included.
Growth figures ride along monthly
Add a weight and a length to one page each month in your corn snake's diary, because a young corn snake grows fast enough that prey size has to keep stepping up, and the figures are what time those steps. Shed skins give a rough length impression but stretch as they come off, so measure the snake himself gently rather than trusting the skin. Note the prey size change on the page where it happens, with how he handled the larger item. In an adult the same monthly line settles into a condition check, confirming weight holds steady on the maintenance rhythm the diary records.
Temperatures, handling, and the keeper's one honest line
Write warm-side and cool-side temperatures on each weekly page of your corn snake's diary, plus water changes and any enclosure change, however small. Finish with one honest behaviour line: calm in hand, unusually flighty, out exploring at dusk, hiding through the whole week. Corn snakes are active enough that a behaviour change is a real signal, and the dated line is what separates 'he has been quiet lately' from 'he went quiet the week the room turned cold'. Escape attempts and any lid or door weakness noticed belong on the page too, recorded while the fixing is still to do.
Keeping the old pages, and knowing when they matter
Keep a corn snake's diary entries for his entire life and send the file with him if he changes homes. The long archive answers the questions keepers actually face: how his growth compares with the expected curve, whether autumn refusals are his established habit, how his shed rhythm has shifted with age. None of that survives in memory across years, and all of it survives in pages that cost nothing to store. Contact a vet when the diary shows regurgitation repeating, refusals stretching on with weight loss on the monthly line, retained eye caps, or breathing that sounds wet. Bringing the recent pages to that appointment turns a vague worry into a timeline. Filing the weekly feed, shed stage, temperatures, and monthly growth inside a KinsLe Pet Passport keeps a corn snake's whole written life in one place, oldest pages included.