LOL because you have no idea how much a ferd is supposed to weigh! In general, though, behemas and chayes have a very wide healthy weight range, even within a basic species. For vilde chayes, how much room they have and what food they have access to makes a huge difference. A vilde chaye who fresses out in say, a small Chabad House in the West, might weigh far less than the typical Boro Park chulent-mit-keegelfresser. A bear that ends up scavenging in Monsey weighs less than a Catskills bear, which in turn is much smaller than a Pennsylvania bear that lives in undeveloped woodlands. 600 kilo bears are found only where the salmon run (Alaska, Siberia, Pomegranate fish department, Ossie’s Fish etc).