The is is my very first time posting on a site like this but I had to share what I use now. I have 3 cats one kitten. 16 yr, 6yr, 5yr & 3 month year old and the most issues I have had so far has been with my eldest cat. She is just as spry as all my other ones believe it or not but when she began to get constipated I didn't know what to do. It was so bad she had surgery. 8 years later and I swear by this.
I use coconut oil. A little bit on a syringe. All will be fine. Give it a day or two in the beginning they will still strain a bit but when they finally pass the feces they will be fine. Just give it to them every other day. They don't mind the taste. If you can't physically put in your cats mouth put it on the paw and or in the food. It doesn't take much to do the trick. (The olive oil works too. Coconut oil (cosco or bjs) $10 also has positive effects on their body just like ours.
Our cat has been constipated for almost two years. He has had several enemas, has been on lactulose, powdered laxative, wet food, etc. The last time we brought him we thought we would have to say goodbye, it was so bad. I finally looked up constipated cat on line and headed to Vitamin Cottage and got him oat bran, organic pumpkin and organic coconut oil. I mix the coconut oil with all natural wet cat food (with flax & fiber) and organic pumpkin, he loves it! He has gained weight, his coat looks great, his eyes are brighter and he is himself again. We bought him a kitty fountain as well and put water with electrolytes & ice cubes when it's hot, anything to get him to drink and soak up the water. He was doing so well that just this week we slacked on giving him the lactulose and he is backed up again, so keep that up with the new diet. He loves coconut oil, he eats it like ice cream!
Like someone else has suggested for cats with constipation, I would try cocount oil. I am an LMT and I use it home in my diet, on my hair on my skin, I give massages with it and I give it to my animals. Coconut oil is antimicrobial, antibacterial, and antiviral. It doesn't alter when you cook it at low temps, and it is not a toxic fat to your body. It will really help your poor kitty's intenstines. My family makes fun of me because I am ALWAYS preaching the health benefits of the stuff. I also use it in place of deoderant, (what a hippie huh LOL) Because I think it is unsafe. It is THE ONLY deoderant replacement that works. It does also kill fleas and ticks, and helps cats pass hairballs. They like it, too! Hope you kitty is better!
Pedialyte (1/4 teaspoon in water bowl) to return electrolyte balance. Cold pressed virgin coconut oil - about 1/8 of a teaspoon, heated in microwave for 10 seconds, then add wet food on the plate you used in the microwave. My vet put my 16 year old cat on a stool softener, but there was still blood in her stool. After putting her on the coconut oil (2 weeks now-morning and night with her wet food), she's healed internally and only a trace amount of blood in her stool.
I now give all my geriatric cats the 1/8 teaspoon of coconut oil in each (wet) meal. This has been a godsend for their health and well being.