My 14 yr old cat is always constipated off and on and is right now!
On an x-ray, near his bowel ,was a shadow but without exploratory surgery, couldn't make out what it was.
Poor guy went through surgery for basically nothing because it was just a calcium deposit that had nothing to do with his constipation.
Tried all vetinary scripted food and laculose , you name it he has tried it. Even 1/8 tsp of Miralax which is not to have a smell or taste but he knew it and wouldnt eat it or drink it.
For 6 weeks with no changes I fed him pro plan purina essentials canned 2.8 oz., with a packet of Fortiflora (comes 30 in a pack) and he was going 1-2 times a day (logs) and I was so happy then bam, he quit eating without reason, constipated again for 4 days took him to the vet after that because then he stopped drinking water, eating and just laying around and then vomited.
They gave him an enema and that was 3 weeks ago and he is still just doing marbles in and out of litter box.
I am now feeding him with much research, Blue Buffalo Wilderness high protein/no grain. He isnt wild about it but was recommended best for elder cats with constipation.
I am giving him nothing else but canned wet of the BBW high protein/ no grain and his water. Been 2 days after the 7 day transition of the Pro
PRO Plan Purina but I am giving it a chance and will update if things get better.