Till now, only one report in Hongkong, China mentioned the positive nucleic acid signal of 2019-Covid in dog. But now that is also skeptical and no evidence support the virus can spread from dog back to human.
In 2004, several invesitgators in the Netherlands and Belgium published papers indicating SARS-CoV live virus could be rcovered from feces of experimentally cats and ferrets 6 weeks after the virus was reportly cleared from bronchial aspirates. Unfortunately, I no longer have the publication citations.