Valium is often used by vets with cats to get then to eat but its an immediate solution but not one that lasts.
It was used with Napoleon way back but after that he wouldnt eat again and trashed his cage and came home and eventually he started eating again. I think I tried pate type food with him but cant remember.
The vet was really worried cos she said after a short time their liver deterioates but assume that Napoleon was ok.
The trouble is , as you know, the next time he refused to eat I lost him and he went into renal failure.
The vets suggested that they either syringe fed him or fed him through a tube. I opted for the former but the senior vet nurse persuaded me that the latter option was the best for him.....................it was the worse thing I could have done and the image of him sticks in my mind forever. What I didnt know and seems that nobody knew at the time was that he was already in renal failure and of course he was nearly 18 and only had one kidney.
Of course as you know I have just lost Ducha after he stopped eating but he was even older and lost all his weight in 24 hrs.
Your situation with Bobby is different as he is young but I think my vet would be asking to do tests on Bobby to determine his organs situation. He obviously cant smell and suspect he also cant taste and after a week or so his tummy will not like much food especiallly all in one go.
I would use AD and the gourmet pate foods, there is the fish one and a turkey or chicken one.
I would try to get him to lick it off your finger which you dip in one of his dishes in front of him. I would also water it down to nearly liquid. If this doesnt succeed I would try putting it on his leg and paws as suggested by someone else. You need to do this very regularily until he gets the hang of eating again.
I feel that by keeping him seperate from the others this is also upsetting him and maybe you need to reconsider this, anything to keep his stress down.
I can feel your pain and stress, I dont know if your vets are 24/7 so that maybe for 24 hrs he could be hospitalized to be syringed fed to try and get him to eat again.
I feel my stress going up just talking about these things but its essential that he eats and drinks and I would have thought he would be dehydrated by now and possibly needs to go on a drip.
I think your vets should come up with the way forward but my experience is that they just dont know.
It maybe you also need to not use bisolven when trying to get him to eat cos I know mine started to seem to know it was there.......how much are you using? Mine only had a pinch a day.
I will pm you my phone number if you want to know about the tube feeding and I think there is another way of doing it to how it was done on Napoleon. I have a phone by my bed if you want to ring before going to the vets..........I think it will wake me up! try a couple of times before giving up cos it rings 8 times before going onto message.
Sending loads and loads of good wishes