Alicia
Adult Guinea Pig
I'm buying a few new things for the piggies, which is why I keep asking questions 
My guinea-pigs had a food ball like this:
http://www.zooplus.co.uk/shop/small_pets/accessories/hay_racks/13210
and they loved it, but I left it on the run in the garden and it went rusty, so I'd like to buy them another one, but what size should they have? I can't remember what size the old one was. My guinea-pigs are all 2 years old, apart from the new piggy getting here at the end of this month who will only be 6 weeks old, but if she's too small to use it I won't give it to her until she's a bit bigger.
My guinea-pigs had a food ball like this:
http://www.zooplus.co.uk/shop/small_pets/accessories/hay_racks/13210
and they loved it, but I left it on the run in the garden and it went rusty, so I'd like to buy them another one, but what size should they have? I can't remember what size the old one was. My guinea-pigs are all 2 years old, apart from the new piggy getting here at the end of this month who will only be 6 weeks old, but if she's too small to use it I won't give it to her until she's a bit bigger.
I was just worried about them getting stuck in it, I'll get the smaller one.