This is amazing! I put one in Taco's cage last night and just filled it with his regular mix because he'd already eaten his couple of bits of fruit and veg for the week and I don't really have any treats from shops..but regular food actually worked great! Every time he tried grabbing it it would make a rustling noise too to egg him on to get inside
His tactic appeared to be to just roll it along and collect them as they dropped out the holes
Although he had a go biting it a couple of times
The interesting thing is he was doing this right next to a bowl of fresh mix, which I think either shows he is not very clever at all for going for the harder option, or he found trying to get them out of the ball a lot more fun than just out of the dish
(I'd like to think the latter)
Really recommend making one of these! Really cute to watch and fun for the hammy!