hey! sorry if this is completely the wrong place to post, just signed up cause i need advice lol so we moved into our house over 6 months ago with our cat, casper. we noticed a black cat hanging around the garden about once or maybe twice, and around a month ago from today out car casper was killed by a car now ever since that exact day, the black cat has came into the garden and he was the most affectionate cat i have ever met in my life. for hours in the garden he just sat on your knee, rubbed against you etc. so cute so he went home and i thought nothing of it, however he has now come every single day we've been in since i am slightly concerned as to why he is so eager to come in. he waits at the door, at the window, etc. he also feels greasy on his fur which goes away with some stroking. he also has dandruff type stuff in his fur too, he also literally CRAVES attention like no other. always follows you and wants you to be around. he also seems very thirsty when he comes, he tries to lick where the sink water comes out of in the garden, so i gave him some water and he drank it all. also was begging for food but didn't give him any. so we let him in once because he would not leave, and didn't see the harm in just giving him a fuss and letting him go home, except.. he never wants to leave. if we put him out, he runs back in so fast and hides. he wants to sleep here, everything. also not quite sussed out who's cat it is either. we think cat has a sibling/friend because they always used to sit together before he started coming on one of the houses windowsills (the house we suspect owns the cat) but sibling has never come. just not sure what to do, it honestly seems like the cat wants attention or even care that hes not getting at home. suggestions??