Fermentability of select polyphenol‐rich substrates in the canine faecal inoculum and their interaction with a canine‐origin probiotic: an in vitro appraisal

BACKGROUND This in vitro study aimed to compare the hindgut fermentability and digestibility of four different sources of polyphenols, namely orange (Citrus sinensis) peel (ORP), pomegranate (Punica granatum) peel (PMP), Indian blackberry (Syzygium cumini) pulp (IBP), and Jerusalem artichoke (Helianthus tuberosus) tuber (JAT), and their influence on the viability of a canine‐origin probiotic, Lactobacillus johnsonii CPN23. RESULTS An in vitro gas production test carried out using the four substrates for a period of 72 h with dog faecal inoculum indicated that the total gas production, dry matter, and organic matter digestibility were significantly (P