Worried as heck

[kt_luvs_kitties]

You arent telling us enough about Simbas actions to get any advice. Can you take him to a vet? Worms might cause him to act slugish if he has had them awhile... But I doubt it.

[Catty1]

Is Simba eating? Is there a sudden heat wave or other weather change?

A quick trip to the vet wouldn't hurt; good thing your mom is asking, and hopefully it is something really simple.

[kt_luvs_kitties]

Yes my first thought is heat also. My cats have MUCH less energy and are more listless in heatwaves. Here it has been up to 100 degrees, so they are all sleeping alot more. Dont worry, just have him get a quick check up, and let us know what the vet says.