Weight first, every week, while he is still growing
A Flemish Giant's weekly diary opens with the scale, because no other rabbit in the home grows this long or this large. Weigh him the same way each week — a baby scale while he fits, then a hold-and-subtract method on a bathroom scale — and write the figure beside his age in weeks. During growth, the diary should show a steady climb; a plateau in a young giant, or a drop at any age, is the single most useful early warning this diary produces. Once he is fully grown, keep weighing weekly anyway: a Flemish Giant can gain or lose a lot behind that impressive frame before the eye catches it.
Hay, pellets and the droppings that grade them
A Flemish Giant eats hay in quantities that surprise new owners, so the diary records it: hay type, roughly how much went in and how much is left, and the measured pellet portion. Beside intake, grade the output — droppings should be plentiful, round and dry, and the diary's plain-words note on their size and number turns 'he seems fine' into evidence. Record each new green as introduced and the droppings' verdict over the next entries. A giant whose droppings shrink while his appetite looks normal is a diary catching gut slowdown early, and that pattern — appetite down, droppings down — is a same-day vet call in any rabbit.
Hocks and flooring, checked on schedule
A Flemish Giant's diary carries a weekly hock line because his feet carry more weight than any other breed's. Note the fur and skin on both hocks — full, thinning, pink, sore — and the flooring he has spent the week on, including exercise surfaces. When you add mats, deepen litter or change his exercise area, record it in the same entry, so the hock line can be read against the change that caused it. Also log exercise honestly: time out of the enclosure and how willingly he moved. A giant moving less, with hocks reddening, has given you two diary facts that together earn a prompt vet visit rather than another week's observation.
Grooming, moult and household notes
A Flemish Giant's coat work is simpler than a wool breed's but the diary still records it: brushing sessions, the heavy moults when fur comes away in sheets, and nail trims — a giant's nails are substantial and overgrown nails change how those loaded feet land. Note behaviour in a line or two: appetite for interaction, litter habits holding or slipping, any new hiding or tooth-grinding, which in a rabbit signals discomfort. Household events belong here too — visitors, a house move, a new pet — because a giant's off week often explains itself in the diary's margins.
Keep the growth year forever — it becomes the baseline
A Flemish Giant's old entries are worth keeping indefinitely, and the first year's pages are the most valuable of all. That weekly growth curve, with its matching diet entries, becomes the reference his adult weights are judged against for the rest of his life; a vet meeting him at five years old will ask what he weighed at one, and the diary answers. Keep adult entries too — the hock history alone justifies the shelf space. Filing every week's page into a KinsLe Pet Passport holds your Flemish Giant's growth curve, diet and hock record in one portable packet that any vet, boarder or sitter can read from the beginning.