CINCINNATI -- After major weight gain progress, baby Fiona is back on a feeding tube, according to the Cincinnati Zoo and Botanical Gardens' latest update.
Fiona is lethargic and "not showing much interest in her bottle," the zoo said, and her weight gain "is slight but fine."
"In addition to providing relief for her teething pain, vets are investigating other causes for her recent setback," the zoo said.
Fiona has made some big steps forward recently, including her first steps since she became strong enough to stand on her own. She also graduated to the "big kid" pool last week as she continues to gain strength, coordination and size.
CUTENESS ALERT: See our gallery of Fiona Fotos. She'll put a smile on your face