SQ said:
Organ meat usually has higher concentrations of toxins ... so not a great idea.
This is why there are suggested restrictions on eating certain organs of wild animals such as deer.
Filtering the blood isnt the livers main function, you are thinking kidneys.
The reason why beef liver is excellent for rats is because:
Carbs are eaten, then broken down into simple sugars (fructose and galactose are one of them)
The liver converts these simple sugars into glycogen
It is the storage site for glycogen
It also creates triglycerides (lipogenesis)
When the rat eats liver, the body doesnt have to do the hard work of breaking down carbs, the essential molecules are there and ready to be converted into amino acids or ATP. Less work for the all ready high motabolism the rat has.
I recommend giving your rat 2 pieces (1inch thick, approx 1cm long) a week if they are adults. And 4 pieces a week to rats under 7months.
Make sure the meat is fully cooked, dont be alarmed by the green tint in the middle of the meat, its normal. I usually cook it in a pan, med heat for 10minutes each side depending on thickness.
this is why i was iffy on the kidney since thier main function is to filter the blood, but it also has some duties storeing fat.