Meat is meat, don't think there's any reason to add stats for that.
What's the difference if the carnivores are fed goat or cow meat?
They could take it in many different directions.... For example carnivores could have quantity of food requirements added. In a modern zoo a tiger would eat more than a lynx for example. A Rex would req more meat than a raptor.... So if they added cows to live feeders a cow would keep a Rex more well fed and boost its nutrition and happiness. 1 cow is equal to 10 goats lets say.
The wetland dinos preferred diet is fish but it isnt required so why not give them a boost for giving it to them. The paleo plants are optional just like fish feeders.
Then what if they offer paleo meat that is butchered dinos to give carnivores a boost? Like say a herra that is so old no mammals existed so it has a hard time digesting modern meat and would need a paleo meat to eat...
Or how about dilos that have weak jaws which is why they kill with the help of venom....maybe you give a diced or hamburger style meat from a slaughter house so it's easier for them to consume...
You could add a fishery building in order to supply fish and a slaughter house building for carnivores...
There are just a few different ways they could go about it. A slaughter house or butcher shop for paleo meat could offer dino selections as well based on time periods and fossil sites... Rex prefers edmontadaurus and trike meat etc...
Like yeah meat is meat but maybe a leaner meat like chicken adds to quickness, higher immunity and lifespan bonus... But hardier meats like cow add to defense and attack stats... They could do something with it...