There is no way to teach them. Also you shouldn't put them in a ball. They can hurt their back or even break their back or back legs. If you look on most guinea pig sites it will tell you not to put them in a ball. If you are looking for some toys check this site: www.guineapigcages.com it is also good for other guinea pig care. Hope this helps!
I Got My Guinea Pig A Ball, But I Doesn't Walk Forward Or Roll In It. I Would Just Reverse (roll Backwards) Or Swing The Ball From Left To Right. Is There A Way To Familiarize Them With The Ball Or Teach Them To Walk In It?
Well I would not get your guinea pig inside that ball again! I've read somewhere that they can break their backs break their legs or even worse be paralysed!!! And besides the reason why they don't walk anyway is because the ball might be to squashy for them and a they like a tunnel with lots of turns twist and random openings so get them one of those
If my put my guinea pigs in a ball will it hurt their backs