Gadzy
Junior Guinea Pig
Hi @Yin I have been going through a very very similar situation with my young sow. The vet did a consultation and said teeth were fine and was I was worried that I needed a second opinion. She continued to not eat her dry food and only greens really. The vet then said she would want to sedate her to have a proper proper check in her mouth to make sure she hasn't missed anything as when their sedated you can have a proper check up. How the teeth line up when more relaxed etc and any spurs missed. Her teeth were fine, but she noticed a white plaque at the back of the throat or mouth which would give similar symptoms of a dental issue. I had a quick scan over of the thread. Has your vet sedated and checked the mouth properly? Perhaps mention fungal issues or thrush to your vet. My vet while she was sedated took x-rays of her bladder and stomach too. Have you tried your piggy on fresh grass? Because mine still absolutely woofed grass. I also gave her some syringed pro biotics which I don't know why or how, but it helped.