I've always given a little bit of hay. Mostly because I've always had other pets that have 'small pet' hay so I like to give the hammies some. Just make sure there are no sharp bits in it and it should be fine. I use timothy or meadow hay. You also have to make sure it is 'dust extracted' and small pet safe, as this means that there wont be any mites in the hay. Some of my hamsters have loved hay and others have ignored it completely
