grieving cat

by dawn
(leeds)

can you offer any advice about our siamese cat please. she's 18 months old and we recently lost our male cat who was around 11 years old. we've also got a 6 months old siamese kitten and her behaviour towards her hasn't changed apart from not playing with her as much. she's often going to the places where our male cat used to like to sleep and is wailing frequently and loudly like she's in actual physical pain. she's also seems more jittery and nervous. we're going to buy a feliway plug in to see if that helps a bit. we're trying to pay her more attention and giving her more cuddles and also maintaining her feeding routine although her food intake has reduced as well. i understand she is grieving but don't know if there is anything else we can do to try to ease her pain?