My 11 yr old male cat just had colon surgery. Then they diagnosed him with diabetes. We brought him home yesterday. The Dr. told us a lot of information, but it is not of any help now. Our cat wont eat and he is going down hill fast. Do I or don't I give him insulin? He's on Prozinc insulin 2units twice daily. I only gave him 1 unit this am because he barely ate a drop. I had to put into mouth with a syringe and I'm not sure he is drinking at all. We are not checking his blood sugar. I need to get him through the night and have him reevaluated in the am by vet.