A corn snake's record begins with his arrival facts: where he came from, his morph if the seller named one, his approximate age, and the prey size he was already taking. That last detail matters most in the first weeks, because offering prey that is too large is a common reason a newly homed corn snake refuses, and you want the refusal measured against what he ate before. Add a day-one photo and his first weight, taken once he has had a short settling period rather than the moment he arrives.
The feeding log is the heart of a corn snake record
Write down every feed your corn snake is offered: the prey type and size, whether it was taken eagerly, taken slowly, or refused, and anything notable such as a regurgitation. Corn snakes are usually reliable feeders, which makes a written run of refusals genuinely informative; two missed feeds during a shed cycle read very differently from four missed feeds in warm, settled conditions. Keep the log factual rather than interpretive. Temperatures belong in the same entry, because a cold week and a feeding strike so often arrive together that separating the notes hides the connection.
Sheds and growth, recorded as they happen
Log each of your corn snake's sheds with its date and condition: one complete piece including the eye caps, or a patchy shed that needed help. A snake moving into shed often turns dull and may refuse food, and the record lets you match a refusal to that cycle instead of worrying over it. Weigh and measure him on a steady rhythm between sheds, since growth in a young corn snake is rapid and the prey size he needs is judged against that growth. Note handling sessions briefly too, especially any change in how calmly he takes them.
Enclosure notes and the security detail owners forget
Record warm-side and cool-side temperatures, the substrate in use, and every enclosure change in your corn snake's notes. Include one unglamorous line most owners skip: the state of the lid, clips, and door seals. Corn snakes are committed escape artists, and a note that a lid corner was lifting, written when you noticed it, is the record that prevents a lost snake rather than documenting one. Water changes and full cleans deserve a brief entry as well, so a later health question can be checked against hygiene rather than guessed at. A brief note of when he was last seen out exploring after dark also helps you judge whether a quiet week reflects the snake settling in or something in the room that changed.
When the record says call the vet
Contact a reptile vet if your corn snake regurgitates more than once, if refusals stretch on with visible weight loss, if shed skin or eye caps stay retained across a cycle, or if you hear wheezing or see mucus around the mouth. The feeding log, shed history, and temperature notes you bring will shape that conversation more than any single observation. Keeping the arrival facts, feeding log, shed record, and enclosure notes inside a KinsLe Pet Passport gives a corn snake one continuous history that any vet, sitter, or future owner can pick up and understand.