The dead and dying roundworms pass into the stool after administration of deworming medication such as pyrantel (Nemex®, Strongid®) or fenbendazole (Panacur®). This treatment will not kill the immature forms of the worm or the migrating larvae, so at least two or three treatments are needed...
If you continue to syringe the cat through the mouth make sure you do it through the side and not the front. The front can aspirate a cats lungs easily. Less likely through the side.I love the churru idea.
Look into the wellness core Grainfree. Turkey, Turkey meal And duck, fish free chicken free No Meat by products fillers or artificial flavors or preservatives. Welness core
Your going to have things trigger you and make you remember something about Bee. I still have tears years after my Batman passed. Hang in there and hopefully you will eventually be able to bring another into your life. Cats take your heart. Wow 20 years is a super long life.