If you haven't had problems with feeding them in their enclosure...then don't let anything stop you! My situation is that one of my frogs somehow started to lose abilities/feelings in the back of his legs, and so I saw crickets kind of nibble at his toes...and yes the others who have all their feeling jerk away when crickets start nibbling at them, but they don't jump away so I have to "shoo" the crickets away sometimes especially during feeding when the frogs are trying to swallow. Another thing is that if the frog is sick, it might be reluctant to want to move...but if the frog's dealing with it just fine, and it's healing, there's probably nothing to worry about. I've noticed things on my frogs after I purchased them that I hadn't seen when I inspected them thoroughly previous to purchase (such as the two I described.) I like to think of it as fate...LoL because what would of happened to them had they been left in poor conditions? (at least in my case they were) So I guess the possibility of an injury on something inside of the cage would be the best bet. How long have you had the frog? Chances are it happened beforehand if you just recently purchased the frog and it's already healed up nicely...I just feel bad when the poor frogs are in any kind of pain...but as long as your frog is eating and shows no sign of infection, I'm sure it'll be just fine (as you probably already know!)