I mean, it's vaguely relevant, so I figured you just...sorta would?
Though it should be noted that the front half is giant bird, but the back half is mountain lion, without the wingspan required to actually haul that mass around naturally. So assuming precise animal comparisons is a bit wonky.
Well, some initial basic arguments... Cows are honestly too valuable to regularly feed a griffon, they provide milk or labour (i.e. pull the heavy wagon or canal boat or whatever), after they are no longer able to do their main job they would be sold relatively cheaply.
There is also a difference between what Oskana can physically eat, how much she needs, how much a griffon needs to gorge etc. Most predators don't eat their full each day and might have failed hunts.
Cattle might not be used for labour in Ostland
I'm also not entirely sure if griffons are supposed to have a realistic wing span or not, mostly because there are limits as to what a model can have, and artistic interpretation, are there any official wings spans?... Now checked the official stance is they have far shorter wings spans than they should… still they might be lighter than they look, fur and feathers can really bulk up stuff.
A fair portion of Oskana's height seems to be part of her height... although yeah fairly long hm... yep got the rough dimensions in my head
The lowest estimate for the amount of meat a cow might have historically I have found is 100kg, or 220 lb. This is quite on the low end and is assuming the empire hasn't been trying to breed high meat cows for 2000 years... I mean 200kg is on the small end for cattle. The smallest wild cattle now are the Anoa which has a weight of 150-300kg but a lot of that won't be actual meat
Here's a list of more farmed cows,
Cattle in the Middle Ages
https://bahs.org.uk/AGHR/ARTICLES/36n2a4.pdf provides a weight of 250 lb/113kg (trying to find lower ends of averages) as a fairy common range, although there are ranges this is the typical average (some maximum of over 500lb with minimum as low as 35lb)
Polar bears (350–700kg/ 770–1,540 lb can eat about 100 pounds a day. However according to
Polar bear diet a 121lb seal will feed it for 8 days although it does need to eat a lot more to build up fat. This is probably the best starting point however they also bit smaller and have a greater need to store fat for when they don't find a lot of prey. A griffon on the other hand needs to be able to fly so wouldn't be gathering as much meat… actually I wonder do griffons migrate over the course of a year to better hunting grounds.
A polar bear consumes 43 seals let alone ringed seals a year. Biologists also calculated that 1,800 to 2,000 polar bears will require 77,400 to 128,469 seals annually. It’s not every day that polar bears find animals they need to eat. You might like to know how much do polar bears eat a day as...
polarbearfacts.net
Alaskan Brown bear (360-540 kg/800-1,200 lb ), 80-90lb a day...
Jaguar's 4 pounds a day
lions 11-16 pounds a day
Siberian tigers (180–306kg/397–675lb), low end 20lb a day to survive or 110lb as something they can eat per day (so likely eats a small amount regularly and a large amount to build up fat for when it has poor hunting.) I'm glad I found this because it does show the difference between need to live and maximum amount... Naturally other animals listed may well gorge
Orca's are fed 150lb in aquariums and would hunt 375lb… although yeah they live in the water so probably completely different needs
A walrus (which quite literally weighs a ton to 1.5tons) eats about 120kg/264lb a day but different forms of meat so less of an idea on accuracy.
I found a statement that a 6 ton t-rex would need to eat about 140kg of meat a day. So most cows would actually feed more than one t-rex... basically giving them the chance to gorge and not hunt for a fair bit.
Modern cows for meat purposes give about 800 to a 1000 lb of meat or 362kg to 454kg... but yeah, I'm not assuming this is a modern cow
Big factor, should and can eat do matter. Oskana eats daily and doesn't have to worry about failed hunts, so she probably doesn't need to gorge. While I believe she might be able to eat small cows I doubt she needs to eat them daily, it is the sort of thing that should feed her for a few days.
I mean seriously 8-10 polar bears would be fairly satisfied to share one modern cow between them, 3 polar bears for a 1700s cow, and that's even if they thought they wouldn't eat for a few more days.
A pig can provide 150lb of meat and seems far closer, so maybe one or two to feed Oskana with the second providing left overs... couldn't find any good 1700s estimates but Poland has some wild boar estimates of 106lb carcass weight for an adult so that should serve as a fairly good estimate...
Other detail... Oskana might be less picky about the types of meat she eats I'm just going with what a human could
Note I'm continuing to research this stuff.... probably won't make another post on it
