Are they stretching when they get up from naps, a good sign of a rested sated lamb x
My Nan was a one for keeping things waaaay past they're use date, I'm surprised how I never contracted owt when I was little, i suppose it comes from the old school, oh that ll come in useful some day....personally we never keep milk until next lambing, always fresh bag, perhaps it has upset her, the nutritionist in it would ve long gone, hope she continues to improve x