Spot (BP) has been rubbing his head on the top of his cage. It is a 10 gallon with 2 hides and some plastic plants and some rocks. A few weeks ago he started rubbing, I re-arranged his plants and hides and he stopped rubbing, but he started up again and now he has a tiny raw spot on the top of his head. He rubbs at the top of the cage and I am worried he will get an infection. So heres the question: Is it time to move on to a 20g? He is about 168 grams and about a foot long, and about 5 months old..