Horses only eat grass because it’s convenient, they regularly eat baby chicks, injured birds, lizards and eggs they find lying around. (The video of the horse casually hoovering up a line of chicks as the mama hen walked them across the paddock haunts me still…)
I’m guessing it’s supposed to be “I am, baby” (in response to ‘are you coming home’) but written in a panicked haste.
Anyone thinking she’d have the time or calm to properly spell check before sending when her kid’s in danger is delusional.