My Vet said the same thing about no more dry food for Smokey. She said they see this type of blockage most frequently in middle-aged, overweight, indoor, not very active male cats. Bingo, Smokey scores in every category.
Her recommendation is no more dry food, encourage more water drinking with something like a running water fountain (He likes to drink from a running faucet when I brush my teeth.), feed wet food, without vegetables, grains, corn, or soy. She said cats are meat eaters, period. The vegie stuff is marketing for people and the grain, corn and soy are cheap sources of protein for the manufacturer. This seems to agree with most of what I have been reading on the on-line veterinary sites, so I can’t see any reason not to do it.
Smokey has discovered he absolutely loves Meow Mix Poultry Shreds and Tender Favorites. I am able to break up his pills and capsules and mix in the liquids and he gobbles it down. Boy do I feel lucky about that; no fighting with him and no bleeding wounds on me.