I know fishy foods aren't great for cats prone to cystitis or urinary issues in general and Jaffa rarely gets fishy foods (except for fish flavoured felix which, lets face it, will contain very little fish!). However, last night I gave him some feline fayre pilchards in jelly. He ate it all and 2 hours later he was sick. Then he started visiting the litter tray every 10 minutes and producing tiny amounts of wee. The last time he had cystitis was about 18 months ago and when he's been to the vet about it we've agreed it's idiopathic and probably stress induced. Anyway, he didn't seem as uncomfortable with it as he has in the past, ie he was lying down looking comfortable between visits to the tray. So I found some old metacam and put about a quarter of a teaspoon in his food bowl with a little chicken and he ate that and licked the bowl. He almost immediately stopped going to the tray as often and everything is back to normal now. He is fine and ate his supper ok (no vomiting) and his breakfast this morning. I don't know whether it was the old metacam or not as I believe this sort of cystitis will sort itself out in the end.
Anyway, I digress - do you think the pilchards were to blame or is that a red herring (pun intended
). Could some fish have such an immediate and sudden effect? I used to give him cystease but stopped when I ran out about 8 months ago (will start again).