We can find menus with meat items in almost all teahouses during the Everest base camp trail. We recommend not eating meat and meat products, especially in higher elevations of the trek because it is carried all the way up from the lower area. They carry that meat by foot, yak, and donkeys which takes many days. There is no chance of getting meat fresh. Yak is available in higher parts of the trail but the religions of locals are not allowed to slaughter animals in that area. So, People depend on lower lands like Lukla for meat products which is a big risk because of not having fresh.