Can you upload the part ?
One would be to make this loft into 2 surface bodies. There is 1 triangular shaped surface and a squashed pointy ellipse sort of shaped surface below that. Make each one of those as an individual feature. the triangular one could be a loft, boundary, or fill given your preferences. The one below it would probably need to be a fill or boundary.
Two would be to cut/trim half of the the animal away, then mirror it. Given everything is symmetrical of course.
You can check the sketch about curvature. I think this necessary 3 sketch for loft.