A great place to upload photos to use in forums is Photobucket.
http://photobucket.com/
Making an account is very easy, and after you do, you can upload your images to there. From there, you can either directly copy and paste the link of the image you wish for us to see in your post, or you can use the 'Img' button located right above your post editor. (It's a button that's right above where you type at)
From there, you simple paste your URL of the image into the bracketed area, like so:
{img}
Post URL here{/img}
(The brackets will be "[" and "]", not "{" and "}")
As for your details, he seems to have a very varied diet. Have you spoke to a vet about his recent behavior?
Either way, thank you for the information. I know one of the more experienced members here might be able to help you out better than I might be able to.
I am a little concerned about this lump on his back though. Does he respond to it when you handle him at all? Also, does he still eat daily?