Why is my cat suddenly lethargic, not eating, and sleeping all day?
Thanks for using Petco Pet Education Center, formerly Petcoach! I'm sorry to hear Jax hasn't been feeling well. Does he go outside? If he does, even if you can't find one right now I would be concerned that he suffered a bite of some kind, as cats can develop abscesses fairly easily when they suffer a trauma. I would be concerned by his behavior, as it does sound like there may be an underlying issue going on, such as an infection, GI upset, or an underlying medical issue (such as kidney disease or diabetes). If he doesn't perk up, start eating and getting some energy back, I would recommend he be evaluated by his regular veterinarian to determine the underlying cause for his change in behavior, have any necessary testing done (xrays, bloodwork) and start any treatment he may need to resolve it. Good luck!
Updated on September 23rd, 2025