Basic CCT info, not quoted, but info is based on their learnings:
- High glucose readings in the initial urine test is not appropriate to base a diagnosis of diabetes.
- Test diet for 3 weeks if diabetes is suspected. Only hay, rolled oats and a very select few vegetables. CCT states only cabbage, but I made enquiries elsewhere based on the hypothetical theory that a pig who cannot safely eat cabbage is suspected diabetic.
Another urine test is then carried out, if the glucose reading is still high, then it can be considered that diabetes is likely. I believe a blood test is also one step to diagnosis, again after the test diet.
Also indicated by CCT literature, it has been said that diabetes is not treatable in guinea pigs, as the vet diagnoses diabetes and treats with insulin, piggie dies, vet assumes diabetes is not treatable. The actual problem is that the pig never had diabetes in the first place, the diagnosis was incorrect, too hasty. The test diet is vital.
No experience of diabetic piggies myself, but these are the basics I have gathered from studies and enquiries.