Unfortunately I am not sure on the poop because my two cats share a litterbox so I don't know which one is doing what. I have noticed that there wasn't as much poop in there the past few days so I have to assume that it is my son's cat that isn't pooping as much. No straining has been noticed. They eat dry cat food, usually cat chow but I do give them canned cat food occasionally which my cat loves and sometimes my son's cat turns her nose up at. Other times she will eat some of it. I just read where canned cat food is better for them so I need to try to get her to eat it.
Thank you for taking the time to try and help me, I'm worried sick.