I was told that if it does not say incandescent on the box than it will not do well with a dimmer switch. Dimmer switches will kill bulbs in less than a week if they are not the right kind.
if you are using a regular lamp with the bulb you currently have than the dimmer will most likely not raise the temp. I use the dimmer because I have a 100 watt and sometimes it gets a little too hot. the dimmer will help for night time temp though. you can leave the light on day and night (because its infared) and dim the bulb down at night so that you can drop the temp a few degrees to exactly where you want it to be. If you have an infared bulb at night than it wont disturb the frog's photoperiod. I use the reptiglo to help with UVB and photoperiod during the day time. i set my timer to 12 hours on 12 off
I am glad to hear he is pooping so much! what does it look like? did it have chunks of fur in it? I agree that it was impaction. Possibly from the mice?
because he evacuated all his bowels, I would try a few worms just to see if there is a feeding response. He is probably hungry. Keep soaking in warm water at least once a week. I usually do this every other day for my frog, just to make sure he sheds his skin. I usually just gently set him in the water and have him decide if he wants to soak or not.
I dont know if this method works for frogs but I tried it with a leopard gecko. for leopard geckos they advise to use 100 % natural olive oil in their mouths for impaction on top of warm water soaks. just a tiny dab of olive oil because it works as a lubricant. I would research this because even though it worked for the gecko, I dont know what effects it has on frogs.
It seems like you have overcome the obstacle! he should be ok now but nightcrawlers will be better for him than mice, just because of his small size. try going back to a pinky and see if he will eat one. tickle his mouth with the pinky for a few minutes.