That ram's a sturdy lil guy. Hope your ewe lamb perks up, they usually do with the care and attention you're giving. Seen it go both ways, had a lamb born then abandoned on frozen concrete and we had to pry him off the ice - he lived and thrived. Others for no reason science or luck knows just up and died.
From the picture she just wants to continue her nap, well formed, just not ready for the big bad world. Lucky she has you instead.