The one in the upper right corner above the albino is absolutely a fire.

The upper left is a maybe. The lower right below the albino is doubtful.

The youngest baby is yellowish, like an immature fire should be. The head has a little bit of a fade, and it has some blushing and a good clear belly.

If the one in the lowest right corner is a fire, it's not a very good one. It has minimal blushing and few flames. I'd need to see the head to tell for sure.

Gale