I brought the in-sideout Gut and Immune health optimiser for my cat who is four years old. I brought him six months ago and he had a upper airway infection and gut intestinal infection. Vet put him on ten day course of antibotics which cured him. I have kept him on probotics for his stomach health. He is a fussy eater and won't eat food once additives are added to it. I have to syring him orally to get the probotics down. My complaint is that he wont eat the in-sideout with his food and when I syringe the powder he finds the taste terrible and froth's at the mouth. I have tried other product's that don't give him this reaction. I think palatability should be a major factor when making these product's. Like all the fancy pet food and cat biscuits that are being made and the cat's won't eat it. I will perservere with the in-sideout and hopefully he will accept it. If not it's just another product that goes in the rubbish bin.