no harm in trying alternate therapies - another thing you may need to consider is keeping her as an indoor cat, rather than letting her outside, as she will have limited mobility and therefore be more vulnerable to threats like cars, foxes, horrible children etc. Cats can be very happy indoors if you make sure they have lots of 'enrichment' like towers, shelves, hidey holes, toys, company etc. Well done you for getting insurance, but you may still want to enquire more closely as to what is covered by it as that full disclosure clause is one they will adhere to very rigidly before they part with your money ...
Good to hear she has company and is being well-cared for.