One of our cats has a very strange thing about milk. Now I know that milk is bad for cats but he seems to be able to tolerate it in small quantities and as he is 16 I do take the view that he should have a little of things he likes but anyway...
When he came to us 18 months ago he didn't seem to know about milk but he tried a bit out of the bottom of my cereal bowl on the desk and developed the most huge love for it. He recognises the milk bottle coming out of the fridge and although normally a quiet, passive cat, he will yowl until he gets it! If I don't give him a little bit in the morning and evening then he will actually sit under the fridge and wait all day until I do! Does anyone else have a cat with an obsession?!