Melissa, just a idea that we've used with the horses. Rub a damp cloth on Jenna's tummy and then rub it on the other mom's stomach to get some of Jenna's scent on the other mom. Maybe you could trick the little guy into nursing the other mom.
I am so very sorry about all the problems you are having with Jenna and her pup. My thoughts
and prayers
are with you.