Just a update, my cob had a intensive scan and they found a forgein (excuse spelling sorry!) Body, tissue has wrapped around it thus causing lump and swelling. So shes having a op under ga, spending a few days at vets, 4weeks box rest at home. Then just the standard 10 mim walks and building it up to more.
Oddly im looking forward to finding out what the "body" is.
Thanks again to everyone for help/advice you gave me