Animal fat is crucial in development, and dairy is a great way to get it in your teenage years.
Here is a general overview of the different fat contents of dairy from various animals:
Hooded Seal >60% The richest milk known; supports rapid pup growth in a short 4-day nursing period in freezing environments.
Reindeer 22.46% Very high in fat, suited for energy demands in cold climates.
Buffalo 6.0 - 15.0% Has a very high fat content, on average about twice as high as cow milk; creamy and ideal for dairy products.
Donkey ~8% Very high fat content, rich and thick dairy
Yak 5.5 - 7.5% Considered a naturally concentrated milk with high levels of fat, protein, and solids.
Sheep 5.9 - 7.1% Richer than cow and goat milk; high solid content makes it excellent for cheese and yogurt.
Camel 3.82 - 5.4% Ranges are wide; one analysis found an average of 3.82%, while other studies report higher values.
Cow ~4% Standard fat content, rich but not super rich
Pig ~ Slightly fattier than cow milk Slightly higher in fat than cow milk, but similar in protein and sugars; not farmed for milk due to practical difficulties.
Black Rhinoceros ~0.2% The skimmed milk of the mammal world; long nursing period makes low-fat,
Generally sheep to buffalo is a great range of high fat dairy, also balanced with carbs and protein.