Commission Implementing Regulation (EU) 2017/455 of 15 March 2017 concerning the authorisation of a preparation of Lactobacillus fermentum (NCIMB 41636), Lactobacillus plantarum (NCIMB 41638) and Lactobacillus rhamnosus (NCIMB 41640) as a feed additive for dogs (Text with EEA relevance. )