The executive medical director for Rotherham, Doncaster and South Humber NHS Foundation Trust apologised to families victims of abuse after two care workers were convicted.
Dr Nav Ahluwalia said: "We apologise again today for the actions of the individuals that have been found guilty".
"The trust has implemented improvements to the learning disability service at this centre to minimise the risks of such incidents happening again", he added.
Susan Murphy and James Hinds will be sentenced today after being found guilty of abusing 12 patients at the Solar Centre in the 17 May.
More top news
The animal is believed to have been attacked with metal bars, knives and rocks and later died of his injuries.
More than 20,000 allegations of abuse by care home workers have been made in the last three years, figures show.
Two private citizens have already paid a "significant deposit" to take the week-long trip.