Yes, your Cham is definitely obease. His casque, cheeks, jaw, legs, and butt are far too curvey.
As captive keepers we tend to try to compensate for the lack of variety in our chams diet by overfeeding them in terms of volume. You never see obease chams in the wild because they are eating relatively few highly nutritious and diverse feeders compared to what most keepers can give in captivity. Quality beats volume, hands down, every time.
Superworms are fine as a treat and pose no health risk to your Cham. Think of them as candy. Variety is key.
There is absolutely nothing wrong with FB Chameleon groups as long as you have a bit of common sense about you and can think for yourself. I’m a member of several. Most people just repeat whatever they’ve heard said previously without having a firm grasp of what they are really saying. If you have a questioning attitude, and you obviously do or you wouldn’t be here, you’ll be just fine.
I recommend cutting your male back to 3-4 large feeders every 3-4 days. Again, focus on quality. Be sure each is gutloded with a healthy dusting of calcium and vitamins, I’m sure you know the schedule.
What kind of gutload, calcium, and vitamins are you currently using?
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