Hi there, my name is Sophie and I am a registered veterinarian and I would like to help you.
Sorry to hear about your kitty problems. This is not uncommon in multicat households. Cats are really sensitive and there are so many triggers to stress behaviours. This certainly sounds like it is stress related given the response to the feliway, which is an excellent product.
Inappropriate urination is seen in cats that are stressed. Female cats don't actually spray at all so she is simply weeing every time she is urinating in the house. Cats who become stressed are very prone to urine infections so I would definitely recommend getting her checked over by your veterinarian. They will be able to take a urine sample from her bladder so that it can be checked for bacteria under the microscope. It can be really easy to contaminate samples caught from the floor with bacteria so they are not good for this test.
It is important to make sure that stressed cats don't need to compete for resources like litter trays. You want to have at least 4 litter trays in separate areas of your house if you have 3 cats. Keeping different food and water bowls scattered about also helps with this. It is good to leave lots of hiding spaces so the cats can escape each other and feel secure in the home.
Feliway can take about 2 weeks to 'kick in' fully and in the UK you are lucky that you can easily source a milk protein product called zylkene. You simply open the capsules and sprinkle in the food. This can help relieve stress at home too. It is certainly a good product to use alongside the feliway and it is pretty cheap. You could try using it for 10 days and see if it helps. You can probably get this from your vet when you take Ebony in to the vets for a urine test.
I hope this information will help you. I think you have made a really sensible start to tackling this issue and it has shown. If you need anything else please just reply. I am always happy to help. If it has been of use please rate/accept my answer so that the website recognizes my work : )
All the best with your kitties, Sophie : )
Thank you for taking the time to answer this and to offer me some assistance.
Firstly the cat litter trays to cats is correct - so I dont think this is causing the problem. (5 cats)
Secondly Stella has definitely been spraying (its the posture she is standing upright, tail quivering in the air - and a straight shot out of her (trying to say this politely?)
Where as the weeing is more bum down in a squat position - and loads more liquid?
Food bowls and water dishes are scattered around the house, and treats are left out and about so they can "find" them. And there are plenty of hiding places for them - some so good I occasionally think I have lost one!!
I was in the pet store yesterday and have bout a cleaning product with enzymes in which I've been told will help to get rid of the odour that they can smell where they have been spraying / weeing.
I'm going to try and get some Zylkene at lunchtime today (failing that I can order it online and have it early next week.
Its ok to not rate you till after I've tried it - in case I have a few more questions? Is this ok?
I'm reluctant to take Ebony to the vets - as they normally have a huge fight when I get her back home - so I was thinking to try and not have this issue to get teh zylkene into them first (and then take her when they are a bit more "chilled"
I will update soon - and Thank you so much :)