What do do if a cat can't poop?

What to do if a cat can't poop?

An old cat did not eat and could not pass motion for a few days. Rectal enemas were given by the other vet but no stools came out. I gave rectal enemas with no result. X-rays revealed rectum impacted with stools and more faecal lumps in the large intestine, numbering around 15 balls of stools. What to do?

1. Open up the large intestine and take out the balls of faeces.  Then change to a high fibre diet. This was successful in the few cases.
2.  Using a gloved finger and extract the stools in the anaesthesized cat. This was my choice as the cat was fat.