Hey everyone, hopefully somebody here can help us ...

We noticed one of our white's tree frogs having trouble moving his back legs yesterday. His toes were curling up and his legs seemed really stiff, like it was difficult for him to move them. We took him out and had a look at him, but he looks normal, no discolourations or redness anywhere. We made sure he had plenty water and dusted crickets in the tank and left him so as to not stress him out.

He slept normally on the glass wall of the tank, toes spread out and legs tucked in, but tonight his legs seemed to be in the same state. I took him out and within a few minutes he was holding himself up and hopping around the table, but when I put him in some lukewarm water with a little honey to try to bathe him, he freaked out, his legs started twitching and he was lying on his tummy. I lifted him out and he seems much happier sitting on the ground, if moving much more slowly than normal.

We have two white's and there seems to be nothing wrong with the other one, he's constantly hungry and flinging himself towards anything that moves, also very alert and bathing just fine. It's possible, since Ritty (the one we're worried about) has always been a bit littler than Bertie, that he doesn't get quite as much to eat.

He behaved like this a couple of months ago, we thought it was because it had been too cold for them and after plenty water and food and the heating turned up, he was fine. But maybe that wasn't the problem?

He ate one cricket yesterday but doesn't seem interested in food today.

The tank set up is below. Bertie is the brown one on the vine, Ritty the green one on the ground. They've always been these colours. We've had them for eight months so they're 9 - 10 months old.

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1. 30 gallon enclosure
2. 2 white's, same age (9 - 10 months) and very close in size
3. no hygrometer but I'd guess between 60-70%
4. temperature 70-75F
5. spring water in two soaking dishes and for misting twice a day
6. orchid bark for substrate
7. one plastic vine, two plastic plants, one branch
8. fed crickets and locusts, alternating every few weeks
9. calcium the food every second feeding
10. no lighting within the tank but constant day-night hours are kept
11. heat mat covering about a quarter of the tank floor
12. Ritty ate at least one cricket yesterday and was seen hunting and eating three locusts 5 days ago
13. difficult to monitor who the poop belongs to but there hasn't been as much lately

17. living in the UK, I would assume the frogs are captive bred, but I don't know for sure

19. Bertie prefers being handled, every two weeks or so, Ritty more rarely than once a month
20. low traffic area
21. Spot check every week or when dirt is obvious. Everything taken out and cleaned with boiling spring water, substrate changed, once every two months. Water change twice every three days.