The Collaborative International Dictionary of English v.0.48:

overfed \overfed\ adj.
   fed excessively.
   [WordNet 1.5 +PJC]

The Collaborative International Dictionary of English v.0.48:

Overfeed \O`ver*feed"\, v. t. & i. [imp. & p. p. Overfed; p.
   pr. & vb. n. Overfeeding.]
   To feed to excess; to surfeit.
   [1913 Webster]

WordNet (r) 3.0 (2006):

overfed
    adj 1: too well nourished

Moby Thesaurus II by Grady Ward, 1.0:

71 Moby Thesaurus words for "overfed":
   allayed, bloated, bursting, choked, cloyed, congested, crammed,
   crowded, disgusted, distended, drenched, engorged, fed-up,
   filled to overflowing, full, full of, glutted, gorged, hyperemic,
   in spate, jaded, jam-packed, jammed, outsize, outsized, overbig,
   overblown, overburdened, overcharged, overdeveloped, overflowing,
   overfraught, overfreighted, overfull, overgorged, overgrown,
   overindulged, overladen, overlarge, overloaded, oversaturated,
   oversized, overstocked, overstuffed, oversupplied, overweight,
   overweighted, packed, plethoric, ready to burst, replete,
   running over, sated, satiated, satisfied, saturated, sick of,
   slaked, soaked, stuffed, stuffed up, supercharged, supersaturated,
   surcharged, surfeited, swollen, tired of, too big, with a bellyful,
   with a snootful, with enough of