The animal shelter in Trenton is not currently staffed, leaving more than a dozen animals without access to a veterinarian, after the City Council voted against renewing its vendor’s contract. City council members voted 4-3 against renewing Trenton Animals Rock’s contract on Thursday. The nonprofit had been operating the shelter under an emergency extension since January, when a previous budget dispute came up. The extension expired March 31. A locksmith came to the shelter on Friday and changed the locks, preventing staff from accessing the remaining 13 dogs and six cats in the shelter, Trent…