Trying Fitch is definitely a good idea
It is a superior substrate compared to Carefresh,especially when considering how much dust Carefresh almost always has where Fitch has no dust.This is extremely important for small creatures with delicate lungs,such as hamsters.If you need bedding right away though,you could just get Carefresh Ultra for now and once that's close to running out invest in Fitch.It's honestly one of the things I envy most about the UK due to how inexpensive it is and the quality difference!