Great with response, thanks!
Well, the breeder told me that Viggo has a sensitive stomach, but nothing more than that, and she didn't mention William.
I have now banned all treats, and they are both on a strict diet. ONLY the gastro intestinal dry food from the vet + the same brand in wet pouches.
Then I give them a paste called "canikur", which is to "fix" stomachs.
Viggos droppings are literally 'perfect' now, he only still have those awful farts
I'll see if William's stools will get firmer in this week. Otherwise the vet is counselled of course.
The gastro intestinal vet diet is not something they can live on (it's only for very sick cats, or for acute situations), as they are kittens and need different amounts of vitamins/minerals - therefore I was searching for good experiences from you guys on food brands.
I'll look into that Royal Canin that lots of you are having succes with
Thanks for the links on the parasite, very interesting information! I'll keep that in mind!