I don't think I've ever seen Ella splooting. She will stretch out her legs as she climbs off the couch (slowly walks front legs forwards on the floor while stretching back legs out on the couch behind her) but that's about it I think
I had to google to find out what you meant! Molly rarely does this, my last dog did more often and my Spaniels were masters of the sploot (if only I’d known what it was called then.)