Well for humans a sign of diabetes is if u have glucose spilled into your urine ( found during an urine analyisis). There is also the blood draw that has the different glucose levels, there is a fasting one and a not fasting one. I would imagine for him they would probably do a blood draw. Let us know how hes doing, and hugs from us to Maxi, going to the Doc can be scarey.
He is doing fine i had his stool tested and it was negative because he has been having the runs (thank God its negative) as for the drinking of water i havent taken him in for that yet i will when he goes for his check up , maxi will be 13months on saturday the 16th