my cat is constipated this morning about a half hour before her insulin dose. I have a bottle of peg 3350 prescribed for her constpation from awhile back. Can I give it to her while or before insulin? EDIT: its all good for now. she finally passed a bowel movment. talked to vet said i did the right thing by no insulin. I was so happy because shes had not much of an appetite during this transition week, but this morning she ate like a champ, went to go to the bathroom and nothin. let out a horrible meow and after trying a couple more times and me giving her a reach around belly massage she pushed a big turd out. then continued to puke out all that food she ate. when i left for work she was happy and looked like she was feeling normal. vet said since shes decided that she doesnt want to eat her high fiber hills dry food going forward to sprinkle some miralax on her wet food breakfast and dinner for now on.