I went to see a vet last month who said that my cat was in a seriously bad health state. She even told me if I would have not brought him to the vet he would have died. She thought at first he only had a few months to live and she gave me a syringe and wanted to show me how to feed him that way, because cats in the state she thought he was do not want to eat and you have to force them. So she came with a critical care pate to show me how to feed him, and my cat jumped on the pate she had brought him and devoured it.
So she changed her diagnostic because of this behavior, thinking that my cat probably decided he did not like the dry food anymore I was giving him, and started to eat less of it, then started to lose weight, which is exactly what happened. My cat was still in a very fragile state, because he had lost a lot of weight, was very dehydrated, amorphous, cold temperature, etc. So she gave him something to hydrate him, then told me to give him the critical care pate in small doses and mix the dose with water and give him this way.
So I bought a lot of that critical care pate, and I had to go back buy more twice, and gave him some whenever he was hungry, because it was important for him to gain weight, and his appetite grew with time, so much that he ate around 41 cans in a month. He feels heavier and he has more energy to come to me for affection, and for more pate of course!
Yesterday I went to see the vet for the continuation of his treatment. My cat has gained two pounds since his last visit, his temperature is normal this time, but he’s still very dehydrated, so she hydrated him again like last time. She gave me medication for him for his heart and kidneys, and she told me she suspects he might have hyperthyroidism so she took a blood sample. She called me later in the evening to confirm with me he does have hyperthyroidism. So now he has medication to take for that and he will have to keep taking the other medication for a while because hyperthyroidism damages the heart and kidneys and the medication is there to prevent that. So as long as his hyperthyroidism condition is not stable yet he has to take them. She has changed his food and he does not need to take critical care pate anymore. I just feel relieved to know what he has and that the medication will make him better. I still have to go to the vet for the coming months to see how he fares with the medications.
http://www.catster.com/lifestyle/cat-health-feline-hyperthyroidism