Amidst an emotional breakup from fiance Jason Trawick, Britney's teacup Yorkshire Terrier, Hannah, is critically ill, reports RadarOnline.com.
Britney's rushed the pup to the vet three times in less than two months.
"Britney found Hannah listless, eyes half shut, not responding to voices, not eating, and having trouble breathing," said a source.
“Her condition remains unstable and if it were not for Britney’s money and ability to pay the vet bills, Hannah would be dead by now,” the source adds.
Get well soon, Hannah. Send her good thoughts via her Twitter.