A bearded dragon's weekly diary works best as a summary page rather than a daily journal, because dragon care is daily but its patterns are weekly. One page per week, written in a few minutes, should capture what he ate, how his environment read, how his body is doing, and how he behaved. Dragons are expressive animals whose appetite, colour, and energy shift with lighting, season, and health, and the weekly page is where those shifts stop being impressions and become a sequence you can point to.
Food and digestion, summed up for the week
Write your bearded dragon's week of eating as totals and highlights: roughly how many live insects across the week, which greens he favoured and which he ignored, and the days supplements were dusted. Note bowel movements in the same block, including how regular they were and anything unusual. A dragon whose greens intake has been quietly shrinking for five weeks is visible on these pages in a way he never is in daily memory. If a new food was introduced or a feeder changed, name it on that week's page so a later appetite change can be matched to the swap.
Temperatures and the UVB bulb's age
Record basking and cool-side temperatures once a week for your bearded dragon, taken at the same time of day, and write the UVB bulb's age in weeks beside them. That bulb line is the diary's most quietly valuable entry: UVB output fades with age, and the week count is what tells you replacement is due before faded output starts costing the dragon calcium he cannot spare. Note any lighting or heating change, a new basking platform, or a moved lamp as it happens. Appetite entries read completely differently once you can see the bulb was overdue in the same weeks.
Weight, sheds, and the brumation pages
Weigh your bearded dragon at the week's end and write the figure on the page, adding shed notes when one completes and a line on body condition. When brumation approaches, the diary earns its keep again: record the weeks he ate less, basked less, and slept in the cool corner, with weights across the slowdown. A brumating dragon who holds weight is following a healthy seasonal pattern; one losing weight through it needs a vet, and only the pages distinguish them. Keep those brumation pages flagged, because next year's slowdown will be judged against them first.
How long to keep a dragon's back pages
Keep the diary for the whole of your bearded dragon's life and let it travel with him if he is ever rehomed. Old entries answer questions nothing else can: when the UVB habit of replacing bulbs was established, how last brumation unfolded, how fast he grew in his first long stretch of pages. Digital pages cost nothing to store and a paper diary costs a shelf corner, so there is no useful moment to start throwing weeks away. If a vet ever asks how long a change has been developing, the honest answer lives in these pages rather than in a guess. Keeping each week's food, temperatures, bulb age, and weight together in a KinsLe Pet Passport gives a bearded dragon a diary whose oldest pages stay as reachable as its newest.