The doctor who’s treating Kentucky Derby winner Barbaro says last night was “not a great night” for the horse.

Barbaro is once again fighting for survival, and the doctor is warning that another setback could bring a decision to euthanatize him.

Over the weekend, Barbaro needed new surgery on the leg he broke in last year’s Preakness.

Surgeons inserted two steel pins in one of the three shattered bones, to eliminate all weight on his right rear foot