We have a pekin that’s newly handicapped. She’s kept inside in a play pen so she has soft bedding. She’s not able to walk anymore but is able to get around her room and has 24/7 access to food and water. In the last 6 weeks she has lost 2 pounds. Her appetite is perfect, no change at all. Her vet is highly suspecting it’s muscle atrophy but that being said she needs to put the weight back on. Does anyone have advice?