Hello all. Im new. My cat is Ares. He has been on vetsulin for about 4.5 weeks now. He is up to 4U for over a week and has been doing very well on it. Except he has constipation here and there. He expelled 3 2" poos yesterday, but today has not gone. I put one tiny drop in his food and he took one lick and refused to eat any more. He is hungry, but being extremely picky (he wants my human food but i refuse to give him any.) He ate a tiny amount of his food(about a quarter of what he normally eats) but im not sure if thats enuf to give him his 4U dosage of insulin. Now it is almost 2 hrs after his normal injection time. Question is: do i just skip his insulin tonight? Is he going to go haywire without it? We just got to a comfortable spot. Sorry that I have not yet filled out the excel sheet, i will soon. Thanks so much for any help everyone!