Yep just look for a young one that has consistently been on ft and ideally NOT mice. I start all of my hatchling on ft rat pinks so this is rarely an issue. But if you find a dream snake and it's on live then it's still pretty easy to get young ones to switch to ft so I wouldn't worry about it as much since you're looking for a hatchling. I've switched many live eaters to ft when I was building my collection and have only come across 1 that hasn't switched for me over the last 2 years but I purchased her already as an adult that had been on live for years. But even with her, I still try ft every few weeks and will eventually get her to switch.