My Cat seems constipated

Can anyone reccomend anything for conspiation in cat's please.Tiggy is a large neutered tom, who used to have a good appetite on a diet of cat food in pouches & occasional dried food. He now will not eat the pouches just licks all the jelly or gravy off but will eat dried food, but not much. He drinks plenty of water since starting eating dried food

Hi I've just joined, so hope by now you have your cat sorted out, but if not, my cat has constipation often, more common in an older cat passing very small hard pieces of stool. My vet recommended ordinary lactulose, you can use it yourself, available over the counter at chemists. I give mine 0.5mg twice a day via a syringe for babies and toddlers, it helps by softening the stools, and get more production, it may take a day or two to start working. Worth a try. Milliemoo.