1. Do not lay the asphalt on the floor of the pig house because the asphalt is toxic and it is unfavorable to pig growth, and it is not suitable for cleaning and disinfection. The floor of the pig house is preferably a concrete floor, which facilitates disinfection even if it is cleaned. 2. Do not keep cats on the farm. There are often mice on the farm, and some farmers keep cats on the farm to deal with rats. This method is not advisable. Because domestic cats carry many germs, viruses and parasites, the toxoplasmosis infection rate is as high as 60%. 3. Do not be a staple food. There is very little nutrients in the rubbish residue, except for a little bit of crude protein in the residue, other things like calcium and phosphorus are almost zero. In addition, it also contains harmful substances such as urease, saponins, anti-trypsin, etc., so the amount of feed should not be too much. When using bean curd refuse to feed pigs, the following points should be noted: (1) Can not be directly fed, because the bean curd residue contains anti-nutrients, and the bean curd residue should be heated for 15 minutes before feeding the pig to destroy the anti-nutritional substances, enhance the palatability, and increase the protein absorption and utilization. (2) Do not feed the bean curd residue alone. Use it in combination with other feeds. The amount should not exceed 1/3 of the total amount of feed. Also add mineral elements and feed some green feed to satisfy the pig's mineral elements and vitamins. Needs. Imported Premium White Carbon Black Silica black is the general name of white powder X-ray amorphous silica and silicate products, mainly refers to precipitated silicon dioxide, gas phase silicon dioxide and ultra-fine silicon dioxide gel, including powder synthesis of aluminum silicate and calcium silicate, etc. Silica is porous and its composition can be expressed as SiO2·nH2O, where nH2O is in the form of surface hydroxyl groups. Soluble in caustic soda and hydrofluoric acid, insoluble in water, solvents and acids (except hydrofluoric acid). High temperature resistance, non-combustion, tasteless, odorless, with good electrical insulation. Imported Premium White Carbon Black,Special Auxiliaries For Thermoplastics,Surface Modification Treatment,Premium White Carbon Black Xingbang High Molecular Materials Co., Ltd. , https://www.chemicaladditive.com