So glad you were able to catch it when you did! We have some prescription food (Hills Science C/D multistress) for our orange boy now and switched to mainly wet food. Fluids are really important especially after one blockage because they’ll be more prone to them of they have it once. But we haven’t had any problems since! In case they didn’t, have the vet show you how to check your cats bladder. You can check and see how full it is and that can give you a good indication of how the recovery is going or if there seem to be any problems later on.