Rice and wheat straws form the backbone of dry roughage for Indian dairy animals, yet their lignified cell walls, low protein content and poor digestibility restrict intake and energy supply, and a large share is still burnt in the field. Solid-state fermentation (SSF) with whiterot fungi, chiefly Pleurotus species, offers a biological alternative to chemical treatment. Fungal laccase and peroxidases enzymatically loosen lignin, exposing cellulose and hemicellulose to rumen microbes, while fungal biomass raises the crude protein of the straw. Published work reports straw crude protein rising from about 2 percent to between 5 and 6.6 percent, in vitro dry matter digestibility reaching about 65 percent, and better nutrient digestibility in small ruminants, but the response varies widely with fungal strain, moisture, temperature and incubation time. This article reviews the mechanism, a field-oriented protocol, compositional and animal responses, an illustrative costing for Indian conditions, practical challenges and research priorities. SSF appears most promising where low-cost inoculum such as spent mushroom substrate are used and treated straw is built into balanced rations.