LO hates porridge ?

My almost 8mo baby who started solids at 6mo is not a fan of porridge to start with. But when he finally willing to take a full bowl of them consecutively for 2-3 days and I thought he finally accept but after that he refuse them again for the next 2-3 days. I wonder if this is normal and if they will eventually eat per normal.... Anyway I will just feed him milk after that few spoons of porridge Cos I’m afraid that he is not full enough. It is so stressful feeding solid 😫