[Saransh]

My labrador had a meningioma removal from back limb joint, the surgery went well, and she was put on Feronac Antibiotics and later Doxycycline.
The eating habits are highly erratic and disinterested. She drink a lot of water but doesn't eat any food. On the fifth day, she vomited a chunk of fibre cloth that used to dress the wound pre surgery, we thought now she'd eat, but she's still not eating, and is more lethargic.

 

[Lillith]

You should probably give your vet a call and ask if you should be worried about those symptoms. They would be able to tell you if this is normal behavior after that type of surgery and on that medication, or if you should have her evaluated.