As some of you will know, Raf has Cushings, diagnosed 3 years ago when he was 9. I had his ACTH levels tested back in August when the vet came out for something else. At the time they were borderline so the vet advised me to have him retested in a couple of months, when the levels should be at their highest. I had him retested last week and this time his results are negative. I was at work when I took the call and couldn't really talk, so I wasn't able to quiz the vet as much as I would have liked. She said to leave him on his current dose of Prascend (one a day) which I'm happy to do as he is feeling and looking well at the moment, but I wonder why his levels have dropped so much. When he was tested back in August he had an abscess (although we didn't know that's what the problem was at the time) - could that have inflated his ACTH levels to make such a difference?