My 8 year old cat has chronic constipation. For 2 years, Lactulose worked great, but now she’s becoming constipated again, and after increasing the Lactulose, she still only goes every 3 days, but now It is diarrhea when she finally goes. She drinks tons of water from the faucet, but also eats lots of dry food, in addition to a little wet food. I am interested in guidance on transitioning her to an all wet food diet, to see if that helps the situation.