What kind of beneficial bacteria is better to use in suckling pig feed?

With the improvement of environmental protection and health care awareness, many companies add probiotics or probiotics to suckling pigs. We hope that the intestines of piglets are naturally healthy. A healthy intestinal tract will bring many benefits, such as solving diarrhea problems, intestinal mucosal nutrition problems, food intake and growth rate, etc. However, suckling pig feed often contains high copper or zinc, a certain amount of antibiotics is also inevitable, as well as the heat loss of granulation processing, are affecting the effect of beneficial bacteria. So, which kind of beneficial bacteria should be added? How should the other components respond to the adjustment? Please discuss it. Should be a very good effect of pollution-free feed. Some beneficial living bacteria resistant to temperature and acid should be selected to ensure the number of living bacteria, such as Sporomyces natto, Bacillus subtilis, etc., and should be avoided sharing with disinfectant water. Live products can be used less or gradually without antibiotics-Bacillus natto is now not on the list of allowed additives. It should not be used.-- will the drugs in the feed have an effect on living bacteria? -- do not want to use drug additives, at least the current conditions are not ripe, Americans are still using clenbuterol, the key to see how to use.-- can not add bacteria! The addition of probiotics to suckling pig feed, which is a nutrient of endogenous bacteria, is very unstable. We have consulted some Dutch experts-we saw a "lactobacillus" at this meeting in Xi'an. I don't know what the effect will be. I have a lactobacillus technical data here. I don't know if it meets your requirements. Piglet experiment: 20 big three-way hybrid healthy piglets, the addition ratio was 2/1000, and the growth period was 47 days. The income of the experimental group was 444.56 yuan, the control group was 305.52 yuan, the cost of lactobacillus in the experimental group was 14.42 yuan, and the economic benefit was 139.04 yuan. This is even higher than the input-output ratio of antibiotics. It's really impressive. -- need to go to large-scale pig farms for further verification.