Goat is acting weird

[The Ranch Girl]

So my goat lupe has always been a sweetheart but when she had her first baby she became skittish. when she is let out to eat she usually eats super fast and happy. I noticed latley she is acting really slow, not moving around as much and wasn't interested in the grass as much. the other goats keep her away from the food so i have to feed them seperetaly.
This isnt normal behavior, do you know what it could be? The other goats are perky and happy.

 

[Alaskan]

The first thing I would do is check her FAMACHA score... so, how pink are her eyelids?

Maybe run a fecal sample to check for worm load.