So, my 16-year old box turtle isn't pooping, I am soaking him (but he's stubborn, I put him in a warm bath, as soon as I let him go, he just leaves his little pool); at the advice of a vet from years ago, I put a bit of castor oil on his food, but that didn't work either- he is his usual very active and alert self, so it doesn't seem to be affecting him but I believe it's been over 2 weeks now- if it goes any longer, I will take him to the vet to see if there is an obstruction I guess- he has gotten constipated before, and it always resolved itself, but I am a little worried now- are there some foods that are better for this situation than other foods? His enclosure is warm, so it's not a "cold thing". Any advice is appreciated, thank you.