Today I went to feed my cats. Whenever I do, they always run up and start eating. But one of my cats took his time and when he got there, he didn't even try eating. I started to get worried because recently I lost two cats to a tick disease that made them not eat. As I watched him more, I noticed he tried pooping several times but never actually went. His stomach keeps making growling sounds and I am not sure if he is hungry or if his tummy is just upset. He is drinking water but he won't play like he usually does. He usually plays like a kitten. Last night I think he ate a rabbit or mouse. But he is still usually hungry. His third eyelid seems to be barely showing. But I think i am just paranoid about that. Is it just constipation or is a tick disease starting to infect him or is it something else?