Cat Vomiting Bile. You might notice that your cat vomits bile late at night or early in the morning, and it might happen right before it’s time for her to eat. For some cat owners, free feeding doesn't work.
Food stimulates the gall bladder to contract, but when the gall bladder does not contract, the bile can back up into the small intestines and stomach. After 12 to 24 hours, feed the cat a mixture of small quantities of boiled chicken breasts, skinned and boned, with rice (50:50 mixture). The main potential causes of cats vomiting are: