Normally yes, but my point is I think he's fucked up enough that if he started feeding he wouldn't be able to stop. He was substantially less damaged in Blood Rites. Lara and his father considered him past the point where he was capable of holding back from killing anyone he fed on and were gobsmacked that he managed to do it. And that was with the love of his life when he was considerably less fucked up. Harry isn't going to just shrug and let Lara arrange that.
And given that she didn't even suggest it I'm not even sure normal feeding would be enough, even if he drained multiple victims. She implied there's a point of no return.
And given that she didn't even suggest it I'm not even sure normal feeding would be enough, even if he drained multiple victims. She implied there's a point of no return.