Effect of silage juice feeding on pig production performance, meat quality and gut microbiome

•Juice from grass silage was produced by a twin-screw press.•The silage juice was successfully incorporated into liquid feed for growing pigs.•Meat quality was not negatively affected by silage juice inclusion.•Gut microbiome of the pigs was not altered in response to silage juice intake.•Silage juice provides a novel sustainable feed ingredient for pork production.