I don't think it's old age they can live for around 12 years and possibly more if in proper care. Sounds like lack of calcium has effected the frog. I answered a post from someone else on here about something similar. Get Repti Vitamins by Zoo Med the Repti Vite without D3 and a Calcium with D3 and get a Ziploc bag and put the frogs food whatever the frog reacts to the most waxworms crickets whatever and shake up the bag with them in and let the frog eat them. Do this in 3 feeds a week. One day use vitamins next feed nothing then the third feed use the calcium the same as the vitamin. You can soak the frog in warm sugar water or just water to help the frog feel better. You should try to feed it a good diet of crickets waxworms mealworms earthworms and other Captive feeders that can really help. I hear the calci worm or repti worm is food in calcium you can pick it up at Petco or PetSmart and feed it to her and see if she will take them. Hope this helps.
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