Hi All, We have 2 guinea pigs female they are 6 months old been handled since we got them. Lately one of them is impossible to get out of the cage she makes a growling sound and walks around low to the ground almost crawling she also does this sometimes in the outdoor run to the other pig. Any advice? She is happy to come and take food from us of course! And once you pick her up she is calm and will sit on lap quite fine even gets legs sprawled out at times! Tia