They look pretty healthy! I do think it is good that you are switching to an UTH mat. Make sure to use a thermostat with a probe. You can combine the heat mat with a light as well, to get proper air temperatures, just make sure to turn it off at night. It isn't UVB right? If it is, be careful when supplimenting with D3 and provide many hides for them to escape it.
Speaking of suppliments, can you link the kind you use? How much and how often do you give? I suppliment with Repashy Calcium Plus, check out this thread;
http://www.geckosunlimited.com/comm...hy-leopard-gecko-calcium-plus-supplement.html
You can suppliment with something like that or use multiple calciums, with and without D3, Repashy Calcium Plus has a balance so you don't have to worry about that. There is also this feeding schedule:
Feed an adult leopard gecko crickets or dubia 2x per week and mealworms 1x per week:
Crickets or dubia>Monday
Crickets or dubia>Thursday
Mealworms>Saturday
Use Zoo Med Repti Calcium with D3 1x per week. Lightly dust it on half the crickets or dubia, not every insect at that feeding.
Use Zoo Med ReptiVite multivitamins without D3 lightly dusted on crickets or dubia every other week or 2x per month. Maybe only lightly dust half of the insects at that feeding.
Use some plain precipitated calcium carbonate (purer than oyster shell calcium). The NOW brand sold in health foods stores is ideal.
Nutritional Comparisons of Insects & Worms
Click:
Page Not Found - Gecko Time - Gecko Time
Monthly Schedule for Leos 18 months old +
Week 1:
Crickets or dubia>Monday- D3 Repti Calcium
Crickets or dubia>Thursday- no dusting
Mealworms>Saturday- no dusting
Week 2:
Crickets or dubia>Monday- D3 Repti Calcium
Crickets or dubia>Thursday- plain (no D3) ReptiVite multivitamins
Mealworms>Saturday- no dusting
Week 3:
Crickets or dubia>Monday- D3 Repti Calcium
Crickets or dubia>Thursday- no dusting
Mealworms>Saturday- no dusting
Week 4:
Crickets or dubia>Monday- D3 Repti Calcium
Crickets or dubia>Thursday- plain (no D3) ReptiVite multivitamins
Mealworms>Saturday- no dusting
Week 5:
Continue this every other week schedule.
The cool end temperatures are great! I am just wondering if those temperatures are air or ground? If those are indeed the air temps on the warm side, it is too hot. Belly heat is vital as well, I had mine have digestive issues (Didn't poop for 2 weeks) when my UTH's temperatures weren't correct. Thermostats do wonders! Here is an excerpt from the caresheet that may aid you when you purchase a heat mat;
Here's a temperature guide for all leopard geckos as measured by the probe of a digital thermometer
88-92 F (31.1-33.3 C) ground temperature right underneath a leo's warm dry hide
no greater than 82ish F (27.8ish C) air temperature - 4 inches above ground on the warm end
no greater than 75 F (23.9 C) air temperature - 4 inches above ground on the cool end
I think that you should just watch your gecko and see if something isn't normal. Keep an eye on the bruising and see if it slowly starts to disappear. Does it look any better from the last time you saw it? Some vets (Look for a reptile specialist if you decide to do this) can give you advice just by a simple call. There are also websites you can go to and for a small fee, talk to a vet.
To be safe, head to a vet, but I think they will be alright if you just watch them. Good luck,
Mara