Sorry if this is not a delicate question...but why does my cat smell like sour milk?

Many cats are lactose-intolerant, so yes, even a small amount could have an effect. If he smells like sour milk, though, I would think maybe he got some on himself. If he’s acting fine I wouldn’t worry.

He’s been really affectionate, but that’s about it…

Take your cat to a hospital. And maybe the milk can matter.You can get a tiny bit of cereal in a tiny bit of milk.

Your veterinarian would be the best person to find the cause. The sour smell could be indicative of a dental infection or something else. Some cats with diabetes will have a distinct odor that comes from their body. So please get him checked.

As long as he is acting fine, I would not worry for now. Keep an eye on him. And yes, the milk can definitely matter.

Remember none of us are vets, though…

Wash him, and then wait a bit to see if he starts to smell again.

The smell just went away later last evening (which is why I thought it might be flatulence). No return of the smell, and he is acting normally today, so I don’t know.

If it were me, I would wait a bit and see how he’s doing. And I have to say, consider yourself lucky if his flatulence only smells like sour milk… it could be so much worse.

It was fortunate that your cat doesn’t stop smelling like sour milk. I worried about it.

Thanks, @ahro0703. He’s been fine since I posted this question.