Hi all. Hoping for advice/experiences - my kitten pepper is just back from her spay op. She’s doing well. Eating, drinking and using littertray.. BUT my adult cat Leo is now hissing and growling at her. They didn’t have the easiest of starts but were really getting on well so this is upsetting.. particularly as she adores him and runs to him. I know this can happen after a stay at vet but do I need to restart the whole intro thing or will it settle? Their intros took ages so dreading having to do that again.. will he recognise her after a while? He’s snipping her bottom a lot but followed by hisses :-( any thoughts much appreciated x