The most preferred form of meat in Bengal is mutton or goat meat. Khashi (castrated goat) or kochi pantha (kid goat), is also common. Some delicate dishes are cooked with rewaji khashi, a goat that has been specifically raised on a singular kind of diet, to encourage the growth of intramuscular fat, commonly known as pardah. Pork is commonly eaten among the Santal tribes, and is quite common on the menus of Chinese restaurants everywhere in Bengal. Chicken is less preferred, though it has grown steadily in popularity over the last few decades. Beef, while extremely popular over in Bangladesh, is much less common in West Bengal, where it is consumed in pockets, and only in certain Muslim homes and some restaurants serving Mughlai food. Eggs both chicken and duck are quite popular. Surprisingly, duck meat is rarely found on menus in West Bengal even though the birds are common in the many ponds and lakes.